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#1 | |
Registered User
Join Date: Jan 2015
Location: Junction City OR
Posts: 1,758
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Re: 72 K30 Build
Quote:
It was a pleasure to meet you.Tom and I are glad that you could come here and check out a small portion of the inventory ![]() It is always nice to be able to help out everyone with needed parts. Looking forward to seeing your progress on the project as well. Thank you again for everything, Thomas |
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#2 |
Registered User
![]() Join Date: Mar 2011
Location: Cement Oklahoma
Posts: 916
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Re: 72 K30 Build
HOORAY, now the fun begins, Brett in this part of your build I would really appreciate some real good measurements and info in changing the C/30 frame to K/30, like I told you I have a chassis and considering doing the same thing, it would really be helpful. good luck, Coop< got my glasses on and notepad handy pencil in hand.
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1971 K20, Coop's beast (project) 1972 C30 wrecker, "Big Ernest" (SOLD) 1975 K5 Blazer (wife's toy) she got it in the divorce 2014 Street Glide Special 1983 K20 Big Block, auto (work horse) |
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#3 | ||
Registered User
Join Date: May 2011
Location: Syracuse, Utah
Posts: 1,930
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Re: 72 K30 Build
Quote:
Quote:
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Brett ![]() 67 Camaro SS Build:http://67-72chevytrucks.com/vboard/s...d.php?t=751594 72 Cheyenne/10 Super 115" Fleetside (Waiting it's turn.) 72 Cheyenne/K30 Super 133" DRW SOLD Build:http://67-72chevytrucks.com/vboard/s...d.php?t=645614 YouTube: https://www.youtube.com/@6dee7-7dee2 |
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#4 |
Registered User
Join Date: May 2011
Location: Syracuse, Utah
Posts: 1,930
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Re: 72 K30 Build
We are still in the process of harvesting axles/steering/hangers/springs/mounts & cross members from the K3500 since I don’t know for sure what we or somebody else may want or need. I know we gotta git rid of this 4x limo frame and the C30 nubby that I’ve decided not to use so we’ve got some room.
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Brett ![]() 67 Camaro SS Build:http://67-72chevytrucks.com/vboard/s...d.php?t=751594 72 Cheyenne/10 Super 115" Fleetside (Waiting it's turn.) 72 Cheyenne/K30 Super 133" DRW SOLD Build:http://67-72chevytrucks.com/vboard/s...d.php?t=645614 YouTube: https://www.youtube.com/@6dee7-7dee2 |
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#5 |
Senior Member
![]() Join Date: Jun 2010
Location: Illinois
Posts: 2,957
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Re: 72 K30 Build
Subscribed! I would like to build one of these too. I have had the thought of either trying to get my father in laws 67 GMC C35 he bought new or get another C30 and build one of these. I have followed JJorgensen52's build also. My initial questions were would I do a K20 frame or mod the C30 frame. Seems like the C30 are a bit more beefy than K20. Although it might be easier for the front axle swap on the K20 but then would have to do something about the inboard mounting on the rear axle for shocks.
I have had a couple 84, 85 and now an 86 GMC K35 and have always wanted a 67-72 style. That is all I can remember my grandpa driving when I was growing up. My thoughts are a possible flat bed with dump and put a plow on the front and just use for my hauling/towing needs with occasional plowing unless I get something else to plow with(just for my personal needs). Going for a look like the following members picture. Would have to say goodbye to my 86 if I go this route. Looks like you are starting to get things figured out now. Looking forward to your progress.
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Roy 85 Short Bed Silverado- Work in progress. http://67-72chevytrucks.com/vboard/s...d.php?t=564818 1987 R10 shortie |
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#6 | |
Registered User
Join Date: May 2011
Location: Syracuse, Utah
Posts: 1,930
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Re: 72 K30 Build
Quote:
I think this white one is also a 127" wb truck?
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Brett ![]() 67 Camaro SS Build:http://67-72chevytrucks.com/vboard/s...d.php?t=751594 72 Cheyenne/10 Super 115" Fleetside (Waiting it's turn.) 72 Cheyenne/K30 Super 133" DRW SOLD Build:http://67-72chevytrucks.com/vboard/s...d.php?t=645614 YouTube: https://www.youtube.com/@6dee7-7dee2 |
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#7 |
6>8 Plugless........
![]() Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 17,140
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Re: 72 K30 Build
Do you plan to keep the spring hangers from this frame?
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Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project Tired of spark plugs? Check this out. |
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#8 |
Registered User
Join Date: May 2011
Location: Syracuse, Utah
Posts: 1,930
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Re: 72 K30 Build
That's good question Mr. Wrencher, RedRoad (Tony) pm'd me a couple of weeks ago and was also curious about some K3500 stuff. I'm still not 100% sure what we're going to use so for now I'm harvesting/collecting parts and hanging onto everything. I'll put you second in line if you would like?
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Brett ![]() 67 Camaro SS Build:http://67-72chevytrucks.com/vboard/s...d.php?t=751594 72 Cheyenne/10 Super 115" Fleetside (Waiting it's turn.) 72 Cheyenne/K30 Super 133" DRW SOLD Build:http://67-72chevytrucks.com/vboard/s...d.php?t=645614 YouTube: https://www.youtube.com/@6dee7-7dee2 |
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#9 |
Registered User
Join Date: May 2011
Location: Syracuse, Utah
Posts: 1,930
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Re: 72 K30 Build
Suspension/chassis options for this Longhorn to K30 Big Block conversion.
Our goals are keeping a low ride height, factory look and we do not want to modify the firewall for clearance. Doing it right the first time and not having to redo anything priceless! What would be the general consensus on engine mount and front & rear spring hangers? Additional info: Longhorn 133” frame, K3500 CC dually chassis parts donor Torquey 454/496 (TBD) mounted in forward 2wd position running stock exhaust manifolds T 400 w/205 transfer case (w/possible GV overdrive?) D60 & CC 14Bolt DRW axles Here are some of our options: Front option #1 Complete 67-72 K1, 2 setup (motor cross member may need to be modified for frame fitment, BB pan & front pumpkin clearance?). You couldn’t look more factory than this so it’s high on my list but might not be practical due to clearance issues. Front option #2 Complete K3500 mounts (clamshell style motor mounts will need to be reworked to fit the Longhorn frame) cross members & hangers complete. Front option #3 Combination of option’s 1 & 2 Use the K3500 motor mounts/cross member with K1,2 front spring hangers. Front option #4 I’ve got a 73 only (according to GM parts book) set of mounts (clamshell style) w/cross member (not as heavy duty as the K3500 stuff). We also have some front spring hangers that I was told came from the same application and they are a little different than the later square bodies. All front options will include adding the front sway bar from the K3500. We’re going to need new front springs. The only front springs we have are from the K3500 and are too long for this build. Also we want to use the factory automatic linkage, so thinking 67-72 length front springs and hangers are a must to leave room for the frame mounted linkage pivot (mounts left side rail close to the front rear hanger and front body mount on that side (I have both T400 & T350 pivot styles))? Also we do have both a 67-72 and the later square body style trans/transfer case mount. I’m a little concerned about the additional weight a GV overdrive might create. Wondering if a 205 right side bracket might help with this? Thinking some would suggest we go with a 4l80e and a standalone controller. This was my thoughts originally as well, we even acquired a core trans from forum member mjensen. As this build project got closer I remembered how many newer OD type transmissions I’ve smoked in the past. ![]() Rear option #1 Complete 71-72 K1,2 hangers w/new springs. Rear option #2 Complete K3500 springs & hangers. JJorgensen52 did this in his 72 GMC K30 build and it looked like it worked quite well. Rear option #3 Complete C30 springs and hangers. Pretty sure we have enough parts left over from the motor home chassis to pull this off. We would need to use additional blocks to get the ride height level. Either rear option 2 or 3 we have spring packs that can be refurbished and shouldn’t need new rear springs.
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Brett ![]() 67 Camaro SS Build:http://67-72chevytrucks.com/vboard/s...d.php?t=751594 72 Cheyenne/10 Super 115" Fleetside (Waiting it's turn.) 72 Cheyenne/K30 Super 133" DRW SOLD Build:http://67-72chevytrucks.com/vboard/s...d.php?t=645614 YouTube: https://www.youtube.com/@6dee7-7dee2 Last edited by 7dee2; 02-27-2015 at 12:34 PM. |
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#10 | |
Simple? What's simple?
![]() Join Date: Apr 2007
Location: Southeast CT
Posts: 1,472
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Re: 72 K30 Build
Quote:
As for ride height - I really don' think you can go any lower than the way my build was, in the front. There's just not enough room to clear the suspension up front. The D60 front axle is TALL and even if you bolted it onto a K10 it would still be about 2" of lift just from that, nevermind the tires.
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CURRENT '50 GMC 100 shortbed Gen IV 4.8 LS - 4L65E (Secret truck, Shhh!!!) Build '63 Buick Wildcat Coupe 401ci Nailhead (Very much in pieces) Photos '66 Impala SS convertible 327-QJet-glide (4 speed swap one of these days...) Photos '69 CST/10 4x4 SWB Stepper 350 2bbl - NV4500/NP241C (Broken Truck!) '72 Sierra Grande 2WD LWB fleetside 350-TH350 Refresh '99 K2500 Silverado RCLB 5.7 Vortec - NV4500/NP241C (Daily) '99 K2500 Suburban 7.4 Vortec - NV4500/NP246 (still working out the bugs) SOLD '71 Custom/10 2WD LWB fleetside - '72 GMC K/3500 Dually (Sold to redryder) |
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#11 | |
Registered User
Join Date: May 2011
Location: Syracuse, Utah
Posts: 1,930
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Re: 72 K30 Build
Quote:
I'm aware the D60 is tall and am trying to keep my build as low as yours is. We are thinking we could live with that height just fine!
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Brett ![]() 67 Camaro SS Build:http://67-72chevytrucks.com/vboard/s...d.php?t=751594 72 Cheyenne/10 Super 115" Fleetside (Waiting it's turn.) 72 Cheyenne/K30 Super 133" DRW SOLD Build:http://67-72chevytrucks.com/vboard/s...d.php?t=645614 YouTube: https://www.youtube.com/@6dee7-7dee2 Last edited by 7dee2; 02-27-2015 at 01:10 PM. |
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#12 |
6>8 Plugless........
![]() Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 17,140
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Re: 72 K30 Build
Man, you need a proper hammer for knocking those rivets off and out. The air type one works wonders!
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Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project Tired of spark plugs? Check this out. |
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#13 | |
Registered User
Join Date: May 2011
Location: Syracuse, Utah
Posts: 1,930
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Re: 72 K30 Build
Quote:
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Brett ![]() 67 Camaro SS Build:http://67-72chevytrucks.com/vboard/s...d.php?t=751594 72 Cheyenne/10 Super 115" Fleetside (Waiting it's turn.) 72 Cheyenne/K30 Super 133" DRW SOLD Build:http://67-72chevytrucks.com/vboard/s...d.php?t=645614 YouTube: https://www.youtube.com/@6dee7-7dee2 Last edited by 7dee2; 03-12-2015 at 11:39 AM. |
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#14 | ||
Registered User
Join Date: May 2011
Location: Syracuse, Utah
Posts: 1,930
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Re: 72 K30 Build
Quote:
Quote:
Wish we could have found my very favorite 5 lb. shorty sledge for this round, it’s currently MIA! Removed some old remnants of the welded on rear bumper brackets. Still need to lose the original rear spring hangers as I’m sure trying to use them would make the truck way to low in the back.
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Brett ![]() 67 Camaro SS Build:http://67-72chevytrucks.com/vboard/s...d.php?t=751594 72 Cheyenne/10 Super 115" Fleetside (Waiting it's turn.) 72 Cheyenne/K30 Super 133" DRW SOLD Build:http://67-72chevytrucks.com/vboard/s...d.php?t=645614 YouTube: https://www.youtube.com/@6dee7-7dee2 Last edited by 7dee2; 03-12-2015 at 12:00 PM. |
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#15 | |
Simple? What's simple?
![]() Join Date: Apr 2007
Location: Southeast CT
Posts: 1,472
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Re: 72 K30 Build
Quote:
![]() What springs are you using in the rear?
__________________
CURRENT '50 GMC 100 shortbed Gen IV 4.8 LS - 4L65E (Secret truck, Shhh!!!) Build '63 Buick Wildcat Coupe 401ci Nailhead (Very much in pieces) Photos '66 Impala SS convertible 327-QJet-glide (4 speed swap one of these days...) Photos '69 CST/10 4x4 SWB Stepper 350 2bbl - NV4500/NP241C (Broken Truck!) '72 Sierra Grande 2WD LWB fleetside 350-TH350 Refresh '99 K2500 Silverado RCLB 5.7 Vortec - NV4500/NP241C (Daily) '99 K2500 Suburban 7.4 Vortec - NV4500/NP246 (still working out the bugs) SOLD '71 Custom/10 2WD LWB fleetside - '72 GMC K/3500 Dually (Sold to redryder) |
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#16 |
Registered User
Join Date: May 2011
Location: Syracuse, Utah
Posts: 1,930
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Re: 72 K30 Build
Yep me too! Sure seems to have been popular back in the day.
![]() Todays plan is to use the K3500 spring pack. Don’t really want to use any blocks like the pic below. So for now it looks like the K1, 2 front hangers with the K3500 spring packs (need to remove 2 add a leafs per side). Rear hangers will probably be K3500 also, TBD by ride height with the front end loaded up. There is quite a bit of difference in most of the rear hangers. Since receiving the shipment of K1, 2 rear hangers from DLTruck1973. I found out that both the K1, 2 and my 72 C30’s rear hangers are all the same. I’ve got 2 sets of these now, oops. The Longhorn frame has some earlier cast style w/grease able pins (cool) that I probably won’t be using. The K3500 rear hanger set is probably the most HD and will yield the most lift.
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Brett ![]() 67 Camaro SS Build:http://67-72chevytrucks.com/vboard/s...d.php?t=751594 72 Cheyenne/10 Super 115" Fleetside (Waiting it's turn.) 72 Cheyenne/K30 Super 133" DRW SOLD Build:http://67-72chevytrucks.com/vboard/s...d.php?t=645614 YouTube: https://www.youtube.com/@6dee7-7dee2 |
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#17 |
Registered User
Join Date: Aug 2013
Location: San Jose Ca
Posts: 965
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Re: 72 K30 Build
Dieselwrencher check out picture 3 he has a single jack. I smacked my hand several time before I got smart and held the punch with a pair of vise grips to pound out the rivets.
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#18 |
Registered User
![]() Join Date: Dec 2012
Location: Los Banos CA
Posts: 2,705
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Re: 72 K30 Build
Hey Brett great build. I will be keeping up on your build. I maybe using a 2wd frame as well. If you have a set of rear hangers you want to get ride of let me know.
I am building a k10 lwb '68 with and for my son. Keep up the updates we all appreciate it.
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1956 Chevy Bel Air 2 door 1956 Chevy 210 4 Door 1970 K20 LWB project the Hulk build w/Supercharged 4.8L-ly2/4L60E HULK BUILD 1970 C10 Yellow/White Deluxe LWB w/ 5.3L-LC9/6L80E 1968 K10 LWB Dark green my son calls it "THE HULK Jr"HULK JR *SOLD* GO ![]() Last edited by First c10; 03-14-2015 at 12:53 AM. |
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#19 | ||
Registered User
Join Date: May 2011
Location: Syracuse, Utah
Posts: 1,930
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Re: 72 K30 Build
Quote:
![]() I agree on what you’re saying about the driveline/pinion angles and think that is pretty good advice. The K3500 rear position rear hangers maybe a must to maintain the angle without a correcting shim. It will be interesting to see were we end up after mocking up the front end. Quote:
I was surprised how different the Longhorn/CC 133 “ vs. CC 157” frame rails really are from the transmission mount rearward. It becomes very obvious why the CC 157" is the strongest frame in the series. Thanks First c10 I appreciate your kind words and will keep you in mind, thanks. Building stuff with your kids is the best and "The Hulk" is going to be a beast!
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Brett ![]() 67 Camaro SS Build:http://67-72chevytrucks.com/vboard/s...d.php?t=751594 72 Cheyenne/10 Super 115" Fleetside (Waiting it's turn.) 72 Cheyenne/K30 Super 133" DRW SOLD Build:http://67-72chevytrucks.com/vboard/s...d.php?t=645614 YouTube: https://www.youtube.com/@6dee7-7dee2 |
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#20 |
Registered User
Join Date: May 2011
Location: Syracuse, Utah
Posts: 1,930
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Re: 72 K30 Build
Some parts arrived, poly cab mount & front spring bushing kits. New 67-72 K20 springs showed up also. All those stickers you would think those springs came from Chumbawamba not Kansas City!
![]() Don't want to lose the 1 ton capacity so we will start with these springs and then add a leaf if needed when the truck is done.
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Brett ![]() 67 Camaro SS Build:http://67-72chevytrucks.com/vboard/s...d.php?t=751594 72 Cheyenne/10 Super 115" Fleetside (Waiting it's turn.) 72 Cheyenne/K30 Super 133" DRW SOLD Build:http://67-72chevytrucks.com/vboard/s...d.php?t=645614 YouTube: https://www.youtube.com/@6dee7-7dee2 |
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#21 |
Registered User
Join Date: May 2011
Location: Syracuse, Utah
Posts: 1,930
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Re: 72 K30 Build
Good news is I know why the 67-72 K1, 2 engine cross member did not fit as I would have liked. So I tried it in my 72 C30 RV front frame nub. Slide right up to the front mounting holes no problem, so why not the Longhorn was my question??
Bad news is the Longhorn frame we acquired is tweaked a little bit. ![]()
__________________
Brett ![]() 67 Camaro SS Build:http://67-72chevytrucks.com/vboard/s...d.php?t=751594 72 Cheyenne/10 Super 115" Fleetside (Waiting it's turn.) 72 Cheyenne/K30 Super 133" DRW SOLD Build:http://67-72chevytrucks.com/vboard/s...d.php?t=645614 YouTube: https://www.youtube.com/@6dee7-7dee2 |
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#22 |
Registered User
Join Date: May 2011
Location: Syracuse, Utah
Posts: 1,930
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Re: 72 K30 Build
Looking at this more closely with a tape found the majority of the frame seems to be square. Not so much from the front cab mount area going forward it hooks to the left side.
Left rail was twisted inward right about ½” at the top where the engine crossmember goes, and then it continues kicking out left going forward. Right rail looks perfect but does bend gradually to the left no twist found. You can kind of see it in these comparison pics.
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Brett ![]() 67 Camaro SS Build:http://67-72chevytrucks.com/vboard/s...d.php?t=751594 72 Cheyenne/10 Super 115" Fleetside (Waiting it's turn.) 72 Cheyenne/K30 Super 133" DRW SOLD Build:http://67-72chevytrucks.com/vboard/s...d.php?t=645614 YouTube: https://www.youtube.com/@6dee7-7dee2 |
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#23 |
6>8 Plugless........
![]() Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 17,140
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Re: 72 K30 Build
You might be able to use a long bar/tube chained to the frame rail and twist it back. Sometimes these frames have pre load in them from being sprung or what have ya, and they will try to go back to their original formed state. And on your pinion angle, that is a easy fix. Cut the original spring perch welds on the diff housing. Set your pinion angle, and re weld.
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Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project Tired of spark plugs? Check this out. |
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#24 | |
Registered User
Join Date: May 2011
Location: Syracuse, Utah
Posts: 1,930
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Re: 72 K30 Build
Quote:
So put a laser down both rails and found both rails hook to the left by around a 1” or so each. Hoped to straighten it ourselves and we have been partially successful these last few days. Got the twist out of the left rail (cross member fits now), also got a little movement on the left front horn back to the right. Not much luck with the right rail and not enough on the left is how it sits now.
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Brett ![]() 67 Camaro SS Build:http://67-72chevytrucks.com/vboard/s...d.php?t=751594 72 Cheyenne/10 Super 115" Fleetside (Waiting it's turn.) 72 Cheyenne/K30 Super 133" DRW SOLD Build:http://67-72chevytrucks.com/vboard/s...d.php?t=645614 YouTube: https://www.youtube.com/@6dee7-7dee2 |
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#25 | |
Simple? What's simple?
![]() Join Date: Apr 2007
Location: Southeast CT
Posts: 1,472
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Re: 72 K30 Build
Quote:
Is there any hook in the frame behind the front cross member? I was just looking at one with a bend in it the other day, and after some careful checking the bend was actually way back at the front cab mount.
__________________
CURRENT '50 GMC 100 shortbed Gen IV 4.8 LS - 4L65E (Secret truck, Shhh!!!) Build '63 Buick Wildcat Coupe 401ci Nailhead (Very much in pieces) Photos '66 Impala SS convertible 327-QJet-glide (4 speed swap one of these days...) Photos '69 CST/10 4x4 SWB Stepper 350 2bbl - NV4500/NP241C (Broken Truck!) '72 Sierra Grande 2WD LWB fleetside 350-TH350 Refresh '99 K2500 Silverado RCLB 5.7 Vortec - NV4500/NP241C (Daily) '99 K2500 Suburban 7.4 Vortec - NV4500/NP246 (still working out the bugs) SOLD '71 Custom/10 2WD LWB fleetside - '72 GMC K/3500 Dually (Sold to redryder) |
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72chevy, dually, flatbed, k30, motorhome |
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