1967 GMC body on a 1989 GMC chassie - The 1947 - Present Chevrolet & GMC Truck Message Board Network

6packed · 03-01-2009, 07:00 PM

1967 GMC body on a 1989 GMC chassie Has anybody tried this?, Is it realalistic, My truck is a 3/4 ton Power-nothing, real low gears, top speed 60mph, I'm thinking of the switch, there both the same wheel base 131.5,
ANY THOUGHTS, thanks

**fine69** · 03-01-2009, 07:38 PM

People have tried it, or at least asked about it.

TONS of work. Much easier to find 1/2 ton stuff from 67-72 to swap it over. Tons of other board members in your area who can help you out if you ask.

Do yourself a favor and become a paid subscriber. That way you can post wanted and for sale ads.

jbristo67 · 03-01-2009, 08:00 PM

What that guy said. Its only 25 a year and well worth it.

Longhorn Man · 03-01-2009, 09:39 PM

welcome to the board.
If it is a 4X4, then it is doable. You'll have to relocate the rear axle forward since the 67 is a 127 inch wheel base, then you'll have to fab up a custom lift kit for the cab since the chassis is not flat like the 67 - 72 frames. you'll probably have to fab up mounting points for the frame and rad core support.
If it is a 2 wheel drive, don't waste your time.
If your truck tops out at 60 MPH, something else is wrong. You should be able to get it to 100 MPH.
you can convert it to 1/2 ton quite easily if that's the main goal.

6packed · 03-01-2009, 10:29 PM

Thanks for the replies,
My truck is a 1967 GMC 3/4 ton, 305 V6, 4 speed-(L,1,2,3), I need to check the gear ratio in the rearend, I guy I bought it from had it for 20years & now I'm the 3rd owner, he used it for towing his trailers, He said that the top speed is around 60 mph.
My goals are to make it go faster down the road, Put disc-brakes on the front, little body work, and replace the wood in the bed.
Any info on donor trucks to get the parts from?
Thanks, CP

**fine69** · 03-01-2009, 10:36 PM

Chevy/GMC trucks starting in 1971 had disc brakes on the front as standard equipment.

So with little effort you can bolt them in.

Find a whole 1/2 ton truck and steal the brakes and the rearend out of it for yours.

Longhorn Man · 03-01-2009, 10:38 PM

i didn't think about the V6 part with it being a GMC... you should be able to get 80out of it though.
That should be a 4.10 gear in the rear with the 4 speed trans.

CPNEJR · 03-01-2009, 10:45 PM

i would change it to a 71-72 frame so you'll have disk brakes and if you want it to go faster i would use a half ton frame for ease of finding higher gear ratios and swap the body onto that. with the half ton frame you'll probably get coil springs so it'll be a better ride.

03-01-2009, 07:00 PM	#1
6packed OL' YELLER Join Date: Mar 2009 Location: Bellingham, Wa Posts: 178	1967 GMC body on a 1989 GMC chassie 1967 GMC body on a 1989 GMC chassie Has anybody tried this?, Is it realalistic, My truck is a 3/4 ton Power-nothing, real low gears, top speed 60mph, I'm thinking of the switch, there both the same wheel base 131.5, ANY THOUGHTS, thanks

03-01-2009, 07:38 PM	#2
fine69 Senior Member Join Date: Dec 1999 Location: Urbana,Ohio,USA Posts: 4,618	Re: 1967 GMC body on a 1989 GMC chassie People have tried it, or at least asked about it. TONS of work. Much easier to find 1/2 ton stuff from 67-72 to swap it over. Tons of other board members in your area who can help you out if you ask. Do yourself a favor and become a paid subscriber. That way you can post wanted and for sale ads. __________________ 2008 Chevy HHR 1/2 panel. 1949 Chevy Panel truck(just sittin, waiting) Board member #6

03-01-2009, 08:00 PM	#3
jbristo67 resident oilfield trash Join Date: Jan 2009 Location: Lubbock TX Posts: 1,465	Re: 1967 GMC body on a 1989 GMC chassie What that guy said. Its only 25 a year and well worth it. __________________ 1967 SWB C10 396/400 factory air factory tach (sadly had to send to a new home) 1986 Honda 70 Fourtrax 1991 Chevrolet K5 blazer 2wd 1982 Mastercraft Pro Star 190 Stars and Stripes 2002 Chevrolet Tahoe 2011 Nissan Armada

03-01-2009, 09:39 PM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: 1967 GMC body on a 1989 GMC chassie welcome to the board. If it is a 4X4, then it is doable. You'll have to relocate the rear axle forward since the 67 is a 127 inch wheel base, then you'll have to fab up a custom lift kit for the cab since the chassis is not flat like the 67 - 72 frames. you'll probably have to fab up mounting points for the frame and rad core support. If it is a 2 wheel drive, don't waste your time. If your truck tops out at 60 MPH, something else is wrong. You should be able to get it to 100 MPH. you can convert it to 1/2 ton quite easily if that's the main goal.

03-01-2009, 10:29 PM	#5
6packed OL' YELLER Join Date: Mar 2009 Location: Bellingham, Wa Posts: 178	Re: 1967 GMC body on a 1989 GMC chassie Thanks for the replies, My truck is a 1967 GMC 3/4 ton, 305 V6, 4 speed-(L,1,2,3), I need to check the gear ratio in the rearend, I guy I bought it from had it for 20years & now I'm the 3rd owner, he used it for towing his trailers, He said that the top speed is around 60 mph. My goals are to make it go faster down the road, Put disc-brakes on the front, little body work, and replace the wood in the bed. Any info on donor trucks to get the parts from? Thanks, CP

03-01-2009, 10:36 PM	#6
fine69 Senior Member Join Date: Dec 1999 Location: Urbana,Ohio,USA Posts: 4,618	Re: 1967 GMC body on a 1989 GMC chassie Chevy/GMC trucks starting in 1971 had disc brakes on the front as standard equipment. So with little effort you can bolt them in. Find a whole 1/2 ton truck and steal the brakes and the rearend out of it for yours. __________________ 2008 Chevy HHR 1/2 panel. 1949 Chevy Panel truck(just sittin, waiting) Board member #6

03-01-2009, 10:38 PM	#7
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: 1967 GMC body on a 1989 GMC chassie i didn't think about the V6 part with it being a GMC... you should be able to get 80out of it though. That should be a 4.10 gear in the rear with the 4 speed trans.

03-01-2009, 10:45 PM	#8
CPNEJR Registered User Join Date: Sep 2003 Location: Franconia,N.H. Posts: 1,029	Re: 1967 GMC body on a 1989 GMC chassie i would change it to a 71-72 frame so you'll have disk brakes and if you want it to go faster i would use a half ton frame for ease of finding higher gear ratios and swap the body onto that. with the half ton frame you'll probably get coil springs so it'll be a better ride. __________________ (Only) Member of the CPNE Fan Club Aint that the truth 67 C-10 350 with 3-speed tranny and 308 gears swb step 82 Z28 Camaro 355 small block over 350 hp and a borg warner super t-10 (blown engine) 72 Chevy K20 Suburban (future project) 70 Chevy K20 now 68 GMC K2500 2003 Chevy 2500hd ccsb 4X4 (daily driver)



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