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#1 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Dave's 1970 GMC 402 Longhorn
Well, I'm far enough into it now that I figured I'd start a build thread. Here's a couple of photos of the truck I'm starting with.
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#2 |
Registered User
Join Date: Sep 2011
Location: Ark City, Kansas
Posts: 3,332
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Re: Dave's 1970 GMC 402 Longhorn
Very Nice!!! I had a chence to buy one of those consoles in a salvage yard, years back...duh....
Gives me inspiration to work on mine, I have a 67 and a 68...67 will be first, I'm getting there..... That "400" decal on RH valve cover, does it look to be factory??? Never seen one, but 396/402 pickups are pretty rare... If you plan to keep a Q-Jet carb, later Q-Jet models are better. www.cliffshighperformance.com is the Q-Jet answer man, only way to go, my opinion. |
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#3 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Dave's 1970 GMC 402 Longhorn
Yep, I believe the 400 decal is stock, and unfortunately, not reproduce by anyone.
Here's where I left off today: |
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#4 |
Registered User
Join Date: Nov 2009
Location: maine
Posts: 2,315
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Re: Dave's 1970 GMC 402 Longhorn
Very nice, love the color.
Posted via Mobile Device
__________________
1972 C10 Deluxe.Shortbed. 402/400. A/C, white interior, needs complete restore. Project Red, white and blue. Used to be a Longbed apperently. http://67-72chevytrucks.com/vboard/s...d.php?t=451950 1971 c10 step 250 3 OTT 1969 c30 TOW-MATER. 307 4 speed, holmes 440 body. http://67-72chevytrucks.com/vboard/s...d.php?t=451082 2006 CTS-V LS2 6spd. |
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#5 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Dave's 1970 GMC 402 Longhorn
Well, here's where I'm at as of this morning. The first batch of parts are ready at the powder coater, so I'll be picking those up and dropping off the inner fenders and rad support!
Doesn't look like much, but man, that's a lot of parts had to come off to get here. I've got 200 photos already of stuff I was worried wasn't obvious, tons of notes, and a garage that looks like a truck exploded... Trying to keep the work area clean, I've already been through a bag of oil absorber, and that's without draining the oil yet. Mostly fuel, coolant, transmission lines, and power steering that I wasn't able to keep off the floor as I took it all apart. Hey Jesse, what's up with the candy-apple-red water pump? :-) |
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#6 | |
Registered User
Join Date: Sep 2011
Location: Ark City, Kansas
Posts: 3,332
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Re: Dave's 1970 GMC 402 Longhorn
Quote:
My 68 is a C-10, and it had chrome valve covers, no 400 or 396 letters.. Looking forward to working on mine... Do you plan to keep it a 3/4 ton??? |
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#7 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Dave's 1970 GMC 402 Longhorn
Yanked the engine and transmission today. Big block plus TH400 is probably a good load for my old Harbor Freight hoist, but with the front clip off you can keep the boom less retracted.
After nicely setting it on the floor I realized I'd forgotten the flexplate-to-converter bolts (there's always something!) but after remedying that got it up on the stand nicely. I may replace the TH400 with a built 200-4R that I have on hand, but the original motor I hope to rebuild and put back in as original. Photo is a little blurry... stupid iPhone. |
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#8 |
6>8 Plugless........
![]() Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 17,140
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Re: Dave's 1970 GMC 402 Longhorn
Man, that's a great truck to start with! Do you have big plans for it, or just a freshen up?
__________________
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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#9 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Dave's 1970 GMC 402 Longhorn
The plan is a complete nut-and-bolt frame-off... plans change but pretty soon it will be too far to turn back anyway!
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#10 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Dave's 1970 GMC 402 Longhorn
Haven't posted any photos in a while, but making some decent progress. Pulled the doors this week, and the interior today. Doors are complicated, but the shop manual actually had the important steps. Hope it goes back together as well, the regulators and tracks are all a little bit of voodoo.
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#11 |
Vintage 4x4s
Join Date: Sep 2010
Location: Prior Lake, MN
Posts: 4,305
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Re: Dave's 1970 GMC 402 Longhorn
Nice! Glad to see its getting saved!
__________________
67 GMC K1500 Custom- 305V6 SM420, PTO, Ram Assist, yellow (the outcast) (project period correct upgrades) 67 GMC C2500 351V6 TH400, AC, PS, PB (can't decide what to do with. Update, decided to keep and will restore ![]() 86 CHV K30 502 th400, apple red NEW 71 CHV K20 350 SM465, ochre (saved work truck) 71 CHV K20 292 SM465, white, tach, PTO, (future project) 72 CHV K20 350 350th, medium blue (project stocker) 01 CHV K2500hd crew, indigo blue ^3 dont run and the others don't see winter either '86 K30 Cummins "Fireside" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=649649 '71 K20 "get driveable" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=590642 '72 K20 Build Thread: http://67-72chevytrucks.com/vboard/s...=493477&page=6 |
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#12 |
6>8 Plugless........
![]() Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 17,140
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Re: Dave's 1970 GMC 402 Longhorn
Man that baby is clean!
__________________
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: Dec 2011
Location: Alaska
Posts: 405
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Re: Dave's 1970 GMC 402 Longhorn
Excellent truck that you have there, seems to have very little if any rust. Good luck with your build and thanks for sharing with us.
__________________
C@rnut001 (Owen) Alaskan Members Check In http://67-72chevytrucks.com/vboard/s...22#post5094422 http://67-72chevytrucks.com/vboard/s...18#post6778618 |
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#14 |
Moderator
![]() Join Date: Jun 2008
Location: Modesto, CA
Posts: 5,775
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Re: Dave's 1970 GMC 402 Longhorn
I'm tuned in
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__________________
2018 Chevy Crew Cab 2006 Impala SS 1965 Plymouth Sport Fury 1970 Chevy Longhorn
70 Longhorn CST Build Adding an AM/FM Decal |
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#15 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Dave's 1970 GMC 402 Longhorn
It's been a while, I've been working on restoring subassemblies to introduce a little variety to the teardown.
Here's the console. To polish out the metalwork I removed all the guards from a bench grinder (do not attempt, read your manual, etc) to install buffing wheels and then got grey and white rouge sticks from Home Depot. Worked well. For the body of the console I super-cleaned it, then used a PPG "etch sponge" and then a PPG "platic prep wipe", then spayed it with plastic bond. Followed that with a coat of PPG DBC color coat and PPG DBU2060 'Fixed'n'Flat' clear. |
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#16 |
Vintage 4x4s
Join Date: Sep 2010
Location: Prior Lake, MN
Posts: 4,305
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Re: Dave's 1970 GMC 402 Longhorn
Wowww that looks super nice and it sound like you did it right! Do you have to buy quart containers of the ppg products or are these spray cans? I hear you on the subassemblies, its like taking smaller bites that result in more encouragement since you can see results faster
__________________
67 GMC K1500 Custom- 305V6 SM420, PTO, Ram Assist, yellow (the outcast) (project period correct upgrades) 67 GMC C2500 351V6 TH400, AC, PS, PB (can't decide what to do with. Update, decided to keep and will restore ![]() 86 CHV K30 502 th400, apple red NEW 71 CHV K20 350 SM465, ochre (saved work truck) 71 CHV K20 292 SM465, white, tach, PTO, (future project) 72 CHV K20 350 350th, medium blue (project stocker) 01 CHV K2500hd crew, indigo blue ^3 dont run and the others don't see winter either '86 K30 Cummins "Fireside" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=649649 '71 K20 "get driveable" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=590642 '72 K20 Build Thread: http://67-72chevytrucks.com/vboard/s...=493477&page=6 |
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#17 | |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Dave's 1970 GMC 402 Longhorn
Quote:
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#18 |
Registered User
Join Date: Dec 2009
Location: poulsbo, WA
Posts: 64
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Re: Dave's 1970 GMC 402 Longhorn
Dave just bumped into the thread. Couldn't have turned her over to a better a person to save her soul. Glad to see your doing all the things and details this truck deserves. Saved it from the shortbox conversion.
As for the water pump, I had a funky 454 candy apple red laying around when the water pump went out. I was in a hurry so i just put it on without painting it. My 1971 swb project is coming along. Looks like you are doing a great job. |
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#19 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Dave's 1970 GMC 402 Longhorn
Got the cab off today. Did it all by myself, using the cab/bed lift plans from the forums and my engine hoist. Other than finding the center of gravity, it was pretty easy.
Unfortunately I have a low-rise lift that the truck is on, and it precludes sliding a hoist in sideways. I managed to use a floor jack to (not gracefully) move the truck around the shop enough to get the hoist under it, but I'm going to face the same problem when it comes time to remove the bed. |
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#20 |
Registered User
Join Date: Jul 2011
Location: Farmville, Va
Posts: 3,026
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Re: Dave's 1970 GMC 402 Longhorn
I really like the shape of your starter truck, I haven't seen any rust anywhere
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#21 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Dave's 1970 GMC 402 Longhorn
Pressure-washing this was an -ugly- job. But hopefully I got dirty "all at once" instead of each time I work on it now... So far I've managed to do it all entirely by myself, including removing the engine and bed and body, which was tricky!
It's not immediately evident, but this is the "after" photo.
__________________
1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#22 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Dave's 1970 GMC 402 Longhorn
Here's a picture of the dash cluster restoration I did. Started with a reproduction "black" bezel and masked/painted it with the body color (PPG DBC 2169) followed by PPG DCU 2060 'low gloss' clear.
Added the obligatory tach and vacuum gauges, and replaced the fuel gauge because the silkscreening was worn in places. I also upgraded it to LED lighting for the heck of it. I found the stock gauges (like my speedo) are painted green on the back and the reproductions are bare tin, which makes the lighting brighter. I wound up putting aluminum foil tape on the back of the green-backed gauge in order to make the lighting more uniform. When you first look at the repro and see its different, you think "Who cares, no one will see the back", but it turns out to matter in the end!
__________________
1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#23 |
6>8 Plugless........
![]() Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 17,140
|
Re: Dave's 1970 GMC 402 Longhorn
Very nice work! Your painting is looking awesome also!
__________________
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 |
Second Chance Program
Join Date: Jun 2006
Location: Portland, OR
Posts: 2,642
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Re: Dave's 1970 GMC 402 Longhorn
Looks good so far!
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#25 |
Registered User
Join Date: Aug 2009
Location: Spring Grove Il
Posts: 122
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Re: Dave's 1970 GMC 402 Longhorn
Nice truck! Nice work!!
__________________
Dustydog 1940 Ford 2D SDN 1970 GMC SB 2004 C5 Vette |
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