Project: 1972 K30 Crew Cab Duramax - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**71blksuper4x4** · 04-20-2014, 11:13 PM

I think I may change my frame plans and rob the 4x4 pieces off mine now to this one.

7dee2 · 04-21-2014, 10:38 AM

Quote:

Originally Posted by 71blksuper4x4

I think I may change my frame plans and rob the 4x4 pieces off mine now to this one.

Long wheel base 1 ton frame would get my vote! Would you build a dually 4x4 going this route?

**jaros44sr** · 04-21-2014, 01:04 PM

Comin' along nicely, nice idea on the frame.....

**71blksuper4x4** · 04-21-2014, 07:04 PM

Quote:

Originally Posted by 7dee2

Long wheel base 1 ton frame would get my vote! Would you build a dually 4x4 going this route?

It will still be a crew short bed 1 ton srw.... Looking it over I might be able to get away with chopping the frame at the back end and scooting the up the spring perches. It will be close. Trevor

teeitup · 05-04-2014, 09:58 AM

Your doing awesome Trevor!!!!!!!!

72CREWCAB · 05-06-2014, 02:34 PM

Did you decide on what your going to do for the headliner(s) Trevor? Project is looking good man! Nice work!

**71blksuper4x4** · 05-06-2014, 07:46 PM

Hey jamie, thanks for your pics again. The way you have yours is how I had it imagined in my head, but I have also thought about stretching the cab to 2 full doors on each side and finishing off both doors in the truck curve but have the squared off burb front. That way you could use factory trim and I could run two front door panel setups. If I go that route, I may stretch the headliner to one larger single headliner and fab up the custom factory looking trim. Trevor

**Dieselwrencher** · 05-06-2014, 07:48 PM

Awesome work on your cab! I think my next project for the winter will be the same thing. But I'm thinking DRW and using my 72 for the rest.

Going with that 1 ton frame is a good idea too.

ksbrktracer · 05-06-2014, 08:21 PM

Looking like a super start ...... !!!! I vote for full size rear doors.... That is how I want to do one.

jbclassix · 05-06-2014, 09:01 PM

Man, I love these crew cabs!

**Dieselwrencher** · 05-06-2014, 09:41 PM

Quote:

Originally Posted by ksbrktracer

Looking like a super start ...... !!!! I vote for full size rear doors.... That is how I want to do one.

X2, that is how I plan to do mine or like a mega cab.

toomanytoyz · 05-07-2014, 10:07 AM

Great Start,Along for the ride............

Rick

Booya · 05-07-2014, 04:11 PM

I'll ride along. What size lift and tires are you going with this one?

**71blksuper4x4** · 05-11-2014, 10:17 PM

No new pictures yet, but did acquire my new c30 157" frame and my new srw axles. Progress will be slow between working on my brother in laws 76 k5 converted to a 73-75 convertible, this truck, and my busy season at work. That's what you get when you are your own fabricator and body man. Trevor

SS Tim · 05-11-2014, 11:02 PM

The full size (or nearly so) doors do change the look visually a lot.
The 157" numbers out very close for a 42" stretch cab (Scott-Bilt style) and a short bed. Need to remember that the axle kickup is higher on a 157" frame than a 133", 3" IIRC. Something I had looked into wanting a 149" wb C30 frame. PM me you email for a couple of drawings to reference.
Now here is an unknown assumed period crew cab conversion I found that appears to have the modifications you are debating. IIRC it was on the board here, my thought is it might be a Stageway and if I can locate the post I'll link it.
Finally here is a quickie "what if" chop I did years ago before we out grew a shortbed.

**71blksuper4x4** · 05-12-2014, 08:41 PM

Thanks Tim, after measuring the kick up, the top of the rails measure about 1 1/2" above the half and three quarter ton frames. I still think it is the best platform to use for length and strength for a diesel crew. This one is huge. Those 8" rails are massive and the frame is every bit of 20 ft.

SS Tim · 05-12-2014, 08:59 PM

Can't agree more. The 157" frame is the king of the LD truck frames (8.18" section height, 2.97" flange width, 0.224" thick, 7.29 section modulus).
Numbers work out to about 99% stiffer than a K20 frame, but then even a C20 (127") frame is about 8% stiffer than a K20. Don't remember the kickup being that minimal but go with what you see. If you are doing a 4x4 conversion I have some thoughts I'd like to run by you.

**71blksuper4x4** · 05-12-2014, 09:33 PM

Hey Tim, I'm all ears, so shoot away or pm me. I ran a straight board across the top of the highest part of the rear frame and measured down to the middle portion of the frame. It was about an 1/8" from being 7" of kickup and measured my 3/4 and it was if I remember right, 5-5 1/2". I'll remeasure that tomorrow. Trevor

ryanroo · 05-12-2014, 10:36 PM

what level of effort will go into this frame to make it work for your needs? the reason i ask is from my own experience. if i was to start over and i wasnt working on a truck that was of some sentimental value, i would just scratch build the frame. i dont know if you have looked at mine or not, but i have boxed the K20 frame front to rear. given the amount of work that was vs the end result of building a frame, i would go full custom fab next time.

**71blksuper4x4** · 05-13-2014, 06:26 AM

Hey Ryan, I'm going for more of a stock build with my truck. Trying to incorporate the strongest parts offered. I don't plan on doing any unnecessary boxing of the frame. The drive train will be a stock duramax, after much back in forth thinking, and tied to a nv4500 and np205. I feel pretty confident this frame will withstand my light abuse and be more than capable to tow with. My modifications will include removing all 4x4 specific brackets and rereviting them to this frame and if I need to add any cross members along the way. This is definitely more beef of a frame compared to a longhorn c30 frame or 3/4 ton frame. Trevor

ryanroo · 05-13-2014, 07:26 AM

sounds good! what are you plans for hooking the 4500 to the duramax? i have no idea if they offer that BH, or what pattern the Dmax used or any of the details there.

**Dieselwrencher** · 05-13-2014, 07:12 PM

Quote:

Originally Posted by 71blksuper4x4

Hey Ryan, I'm going for more of a stock build with my truck. Trying to incorporate the strongest parts offered. I don't plan on doing any unnecessary boxing of the frame. The drive train will be a stock duramax, after much back in forth thinking, and tied to a nv4500 and np205. I feel pretty confident this frame will withstand my light abuse and be more than capable to tow with. My modifications will include removing all 4x4 specific brackets and rereviting them to this frame and if I need to add any cross members along the way. This is definitely more beef of a frame compared to a longhorn c30 frame or 3/4 ton frame. Trevor

I'd reconsider riveting the frame back together. I'd use grade 8 bolts and bolt it together. Grade 8 bolts are stronger than those rivets they use in these frames. I'm sure you're going for a stock appearing look, but you blew that out of the water when you said crew cab and duramax.

SS Tim · 05-13-2014, 08:14 PM

Quote:

Originally Posted by 71blksuper4x4

Hey Tim, I'm all ears, so shoot away or pm me. I ran a straight board across the top of the highest part of the rear frame and measured down to the middle portion of the frame. It was about an 1/8" from being 7" of kickup and measured my 3/4 and it was if I remember right, 5-5 1/2". I'll remeasure that tomorrow. Trevor

Actually that sounds real close. Showing 5.46" on a C20 (127") and 7.18" on a C30 (157").

mjensen · 05-18-2014, 12:13 PM

I'm on board. Great looking work so far!

Bomp · 05-18-2014, 12:31 PM

Got my attention here too.

04-20-2014, 11:13 PM	#26
71blksuper4x4 SWB 4x4 Collector Join Date: Jun 2001 Location: Osage City, KS Posts: 5,155	Re: Project: Big Grapefruit I think I may change my frame plans and rob the 4x4 pieces off mine now to this one. Attached Images __________________ TREVOR 1970 CST swb 4x4 (speedwarning,cruise,tilt,tach,8track, original red shoulder belts,tow hooks) 1972 Jimmy (soon to be Hickey cloned) 1971 Cheyenne Super 4x4 swb (tilt,tach,buckets, original blue shoulder belts,am/fm,cruise,tow hooks, dealer 8 track) 1972 Cheyenne Super K20 4x4 Custom Camper (tilt, tach, am/fm, tow hooks, bed toolbox, aux gas tank 1972 Cheyenne Super Crew Cab K30 4x4 Duramax, Allison, np205, buckets, tow hooks (CURRENT PROJECT) http://67-72chevytrucks.com/vboard/s...d.php?t=624819 1989 V3500 Crew Cab (454tbi, NV4500, np205) 1970 Chevelle SS (LS5 454,th400,8track,buckets,tach) :2004 Jeep Wrangler Rubicon (daily driver) WTB: 1968-70 Cruise Control Lever

04-21-2014, 01:04 PM	#28
jaros44sr Senior Member Join Date: May 2006 Location: Philadelphia, Pa. 19454 Posts: 9,692	Re: Project: Big Grapefruit Comin' along nicely, nice idea on the frame..... __________________ Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim

05-04-2014, 09:58 AM	#30
teeitup Just like to part out trucks!! Join Date: Nov 2001 Location: Meriden, Ks-North of Topeka 10 miles Posts: 27,396	Re: Project: Big Grapefruit Your doing awesome Trevor!!!!!!!! __________________ 67 Chev swb stepside 4x4 283 4 speed SOLD 72 blazer 4x4 4 speed Cheyenne 72 GMC swb 4x4 fleet 4 speed, original paint 1958 Cameo (one of 1405 built, it was my dads) 2020 chevy Apex 4x4 crew cab 1969 Z28 with the 302 1980 chevy swb 4x4 1964 chevell Malibu SS 1976 K20, sold new originally out of my dads chevy dealership Members that I've met, over 200 probably closer to 300 in the 12 years I've been on this site, everyone I met "It was a pleasure"

05-06-2014, 02:34 PM	#31
72CREWCAB Registered User Join Date: May 2002 Location: homer ak Posts: 149	Re: Project: Big Grapefruit Did you decide on what your going to do for the headliner(s) Trevor? Project is looking good man! Nice work!

05-06-2014, 07:46 PM	#32
71blksuper4x4 SWB 4x4 Collector Join Date: Jun 2001 Location: Osage City, KS Posts: 5,155	Re: Project: Big Grapefruit Hey jamie, thanks for your pics again. The way you have yours is how I had it imagined in my head, but I have also thought about stretching the cab to 2 full doors on each side and finishing off both doors in the truck curve but have the squared off burb front. That way you could use factory trim and I could run two front door panel setups. If I go that route, I may stretch the headliner to one larger single headliner and fab up the custom factory looking trim. Trevor __________________ TREVOR 1970 CST swb 4x4 (speedwarning,cruise,tilt,tach,8track, original red shoulder belts,tow hooks) 1972 Jimmy (soon to be Hickey cloned) 1971 Cheyenne Super 4x4 swb (tilt,tach,buckets, original blue shoulder belts,am/fm,cruise,tow hooks, dealer 8 track) 1972 Cheyenne Super K20 4x4 Custom Camper (tilt, tach, am/fm, tow hooks, bed toolbox, aux gas tank 1972 Cheyenne Super Crew Cab K30 4x4 Duramax, Allison, np205, buckets, tow hooks (CURRENT PROJECT) http://67-72chevytrucks.com/vboard/s...d.php?t=624819 1989 V3500 Crew Cab (454tbi, NV4500, np205) 1970 Chevelle SS (LS5 454,th400,8track,buckets,tach) :2004 Jeep Wrangler Rubicon (daily driver) WTB: 1968-70 Cruise Control Lever

05-06-2014, 07:48 PM	#33
Dieselwrencher 6>8 Plugless........ Join Date: Sep 2007 Location: Prairie City, Ia Posts: 17,139	Re: Project: Big Grapefruit Awesome work on your cab! I think my next project for the winter will be the same thing. But I'm thinking DRW and using my 72 for the rest. Going with that 1 ton frame is a good idea too. __________________ 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.*

05-06-2014, 08:21 PM	#34
ksbrktracer TNT-MOTORSPORTS Join Date: Mar 2008 Location: TULSA OKLAHOMA Posts: 2,692	Re: Project: Big Grapefruit Looking like a super start ...... !!!! I vote for full size rear doors.... That is how I want to do one.

05-06-2014, 09:01 PM	#35
jbclassix Junk Yartist Join Date: Jul 2009 Location: Greeley, CO Posts: 2,203	Re: Project: Big Grapefruit Man, I love these crew cabs! __________________ -Jeremy YOU ONLY FAIL IF YOU STOP TRYING 70 Crew Cab Build Link 70 GMC Suburban 4X4 build thread 95 Yukon Daily Driver Rebuilding an NP205

05-07-2014, 10:07 AM	#37
toomanytoyz Luv the Crewcabs Join Date: Aug 2006 Location: Andrews, In. 46702 Posts: 4,097	Re: Project: Big Grapefruit Great Start,Along for the ride............ Rick __________________ 55 Nomad 52 Willys Truck 67 Stepper 67 Fleet 68 Wrecker 68 Suburban 76 Crewcab 79 Gmc Dumptruck 84 Blazer 86 Crewcab Stepside 87 Iroc 89 GMC Plow Truck 91 Camaro Vert 96 Z71 Stepsde

05-07-2014, 04:11 PM	#38
Booya Registered User Join Date: Jun 2008 Location: Boise Idaho Posts: 117	Re: Project: Big Grapefruit I'll ride along. What size lift and tires are you going with this one?

05-11-2014, 10:17 PM	#39
71blksuper4x4 SWB 4x4 Collector Join Date: Jun 2001 Location: Osage City, KS Posts: 5,155	Re: Project: Big Grapefruit No new pictures yet, but did acquire my new c30 157" frame and my new srw axles. Progress will be slow between working on my brother in laws 76 k5 converted to a 73-75 convertible, this truck, and my busy season at work. That's what you get when you are your own fabricator and body man. Trevor __________________ TREVOR 1970 CST swb 4x4 (speedwarning,cruise,tilt,tach,8track, original red shoulder belts,tow hooks) 1972 Jimmy (soon to be Hickey cloned) 1971 Cheyenne Super 4x4 swb (tilt,tach,buckets, original blue shoulder belts,am/fm,cruise,tow hooks, dealer 8 track) 1972 Cheyenne Super K20 4x4 Custom Camper (tilt, tach, am/fm, tow hooks, bed toolbox, aux gas tank 1972 Cheyenne Super Crew Cab K30 4x4 Duramax, Allison, np205, buckets, tow hooks (CURRENT PROJECT) http://67-72chevytrucks.com/vboard/s...d.php?t=624819 1989 V3500 Crew Cab (454tbi, NV4500, np205) 1970 Chevelle SS (LS5 454,th400,8track,buckets,tach) :2004 Jeep Wrangler Rubicon (daily driver) WTB: 1968-70 Cruise Control Lever

05-11-2014, 11:02 PM	#40
SS Tim Registered User Join Date: Aug 2010 Location: Edwards, CA Posts: 7,503	Re: Project: Big Grapefruit The full size (or nearly so) doors do change the look visually a lot. The 157" numbers out very close for a 42" stretch cab (Scott-Bilt style) and a short bed. Need to remember that the axle kickup is higher on a 157" frame than a 133", 3" IIRC. Something I had looked into wanting a 149" wb C30 frame. PM me you email for a couple of drawings to reference. Now here is an unknown assumed period crew cab conversion I found that appears to have the modifications you are debating. IIRC it was on the board here, my thought is it might be a Stageway and if I can locate the post I'll link it. Finally here is a quickie "what if" chop I did years ago before we out grew a shortbed. Attached Images __________________ Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID Blazer SPID Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders Do you have a 1972 Plaid Pickup? Plaid Blazer ** Plaid Suburban

05-12-2014, 08:41 PM	#41
71blksuper4x4 SWB 4x4 Collector Join Date: Jun 2001 Location: Osage City, KS Posts: 5,155	Re: Project: Big Grapefruit Thanks Tim, after measuring the kick up, the top of the rails measure about 1 1/2" above the half and three quarter ton frames. I still think it is the best platform to use for length and strength for a diesel crew. This one is huge. Those 8" rails are massive and the frame is every bit of 20 ft. Attached Images __________________ TREVOR 1970 CST swb 4x4 (speedwarning,cruise,tilt,tach,8track, original red shoulder belts,tow hooks) 1972 Jimmy (soon to be Hickey cloned) 1971 Cheyenne Super 4x4 swb (tilt,tach,buckets, original blue shoulder belts,am/fm,cruise,tow hooks, dealer 8 track) 1972 Cheyenne Super K20 4x4 Custom Camper (tilt, tach, am/fm, tow hooks, bed toolbox, aux gas tank 1972 Cheyenne Super Crew Cab K30 4x4 Duramax, Allison, np205, buckets, tow hooks (CURRENT PROJECT) http://67-72chevytrucks.com/vboard/s...d.php?t=624819 1989 V3500 Crew Cab (454tbi, NV4500, np205) 1970 Chevelle SS (LS5 454,th400,8track,buckets,tach) :2004 Jeep Wrangler Rubicon (daily driver) WTB: 1968-70 Cruise Control Lever

05-12-2014, 08:59 PM	#42
SS Tim Registered User Join Date: Aug 2010 Location: Edwards, CA Posts: 7,503	Re: Project: Big Grapefruit Can't agree more. The 157" frame is the king of the LD truck frames (8.18" section height, 2.97" flange width, 0.224" thick, 7.29 section modulus). Numbers work out to about 99% stiffer than a K20 frame, but then even a C20 (127") frame is about 8% stiffer than a K20. Don't remember the kickup being that minimal but go with what you see. If you are doing a 4x4 conversion I have some thoughts I'd like to run by you. __________________ Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID Blazer SPID Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders Do you have a 1972 Plaid Pickup? Plaid Blazer ** Plaid Suburban

05-12-2014, 09:33 PM	#43
71blksuper4x4 SWB 4x4 Collector Join Date: Jun 2001 Location: Osage City, KS Posts: 5,155	Re: Project: Big Grapefruit Hey Tim, I'm all ears, so shoot away or pm me. I ran a straight board across the top of the highest part of the rear frame and measured down to the middle portion of the frame. It was about an 1/8" from being 7" of kickup and measured my 3/4 and it was if I remember right, 5-5 1/2". I'll remeasure that tomorrow. Trevor __________________ TREVOR 1970 CST swb 4x4 (speedwarning,cruise,tilt,tach,8track, original red shoulder belts,tow hooks) 1972 Jimmy (soon to be Hickey cloned) 1971 Cheyenne Super 4x4 swb (tilt,tach,buckets, original blue shoulder belts,am/fm,cruise,tow hooks, dealer 8 track) 1972 Cheyenne Super K20 4x4 Custom Camper (tilt, tach, am/fm, tow hooks, bed toolbox, aux gas tank 1972 Cheyenne Super Crew Cab K30 4x4 Duramax, Allison, np205, buckets, tow hooks (CURRENT PROJECT) http://67-72chevytrucks.com/vboard/s...d.php?t=624819 1989 V3500 Crew Cab (454tbi, NV4500, np205) 1970 Chevelle SS (LS5 454,th400,8track,buckets,tach) :2004 Jeep Wrangler Rubicon (daily driver) WTB: 1968-70 Cruise Control Lever



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05-12-2014, 10:36 PM	#44
ryanroo Senior Member Join Date: Apr 2004 Location: sw colorado Posts: 2,720	Re: Project: Big Grapefruit what level of effort will go into this frame to make it work for your needs? the reason i ask is from my own experience. if i was to start over and i wasnt working on a truck that was of some sentimental value, i would just scratch build the frame. i dont know if you have looked at mine or not, but i have boxed the K20 frame front to rear. given the amount of work that was vs the end result of building a frame, i would go full custom fab next time. __________________ 72 K20 12v build 72 K20 "parts truck" A place for your diesel swap questions

05-13-2014, 06:26 AM	#45
71blksuper4x4 SWB 4x4 Collector Join Date: Jun 2001 Location: Osage City, KS Posts: 5,155	Re: Project: Big Grapefruit Hey Ryan, I'm going for more of a stock build with my truck. Trying to incorporate the strongest parts offered. I don't plan on doing any unnecessary boxing of the frame. The drive train will be a stock duramax, after much back in forth thinking, and tied to a nv4500 and np205. I feel pretty confident this frame will withstand my light abuse and be more than capable to tow with. My modifications will include removing all 4x4 specific brackets and rereviting them to this frame and if I need to add any cross members along the way. This is definitely more beef of a frame compared to a longhorn c30 frame or 3/4 ton frame. Trevor __________________ TREVOR 1970 CST swb 4x4 (speedwarning,cruise,tilt,tach,8track, original red shoulder belts,tow hooks) 1972 Jimmy (soon to be Hickey cloned) 1971 Cheyenne Super 4x4 swb (tilt,tach,buckets, original blue shoulder belts,am/fm,cruise,tow hooks, dealer 8 track) 1972 Cheyenne Super K20 4x4 Custom Camper (tilt, tach, am/fm, tow hooks, bed toolbox, aux gas tank 1972 Cheyenne Super Crew Cab K30 4x4 Duramax, Allison, np205, buckets, tow hooks (CURRENT PROJECT) http://67-72chevytrucks.com/vboard/s...d.php?t=624819 1989 V3500 Crew Cab (454tbi, NV4500, np205) 1970 Chevelle SS (LS5 454,th400,8track,buckets,tach) :2004 Jeep Wrangler Rubicon (daily driver) WTB: 1968-70 Cruise Control Lever

05-13-2014, 07:26 AM	#46
ryanroo Senior Member Join Date: Apr 2004 Location: sw colorado Posts: 2,720	Re: Project: Big Grapefruit sounds good! what are you plans for hooking the 4500 to the duramax? i have no idea if they offer that BH, or what pattern the Dmax used or any of the details there. __________________ 72 K20 12v build 72 K20 "parts truck" A place for your diesel swap questions

05-18-2014, 12:13 PM	#49
mjensen Registered User Join Date: Jun 2006 Location: Utah Posts: 1,562	Re: Project: Big Grapefruit I'm on board. Great looking work so far! __________________ Mike '69 GMC 3/4 ton 4x4 Build Thread

05-18-2014, 12:31 PM	#50
Bomp Registered User Join Date: Apr 2011 Location: . Posts: 3,104	Re: Project: Big Grapefruit Got my attention here too.

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