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09-26-2013, 04:40 PM
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#1 |
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Registered User
Join Date: Apr 2013
Location: Western Montana
Posts: 50
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1967 3/4 ton Cummins GMC
Well after looking at all of these great looking Chevy and GMC pickups for years I thought it was about time I started on mine.
I had a 67 GMC 25 years ago and selling it was a sad day for me, so I found a 3/4 ton fleetside 67 GMC in pretty original condition and decided it would be a great 2WD Cummins diesel conversion. First I stripped and power washed the inside and disassembled to not only check it out, but to prep for body work and paint! Plus it is nice to have stuff out of the way for the cummins conversion. I bought a 1993 Dodge 1 ton for the engine (165K) and automatic overdrive transmission. The bad part is I used the engine in another conversion, a 1999 Ford Super Duty that my son and I did. Well I started tearing it down and cutting 12 Inches out of the frame to make it a short wheel base. I had a Sterling rear end that I had from a F250 with a 7.3 IDI that went under the rear. I had drum breaks on the front so I traded some parts for a 1977 Chevy 3/4 ton disk brake front end, so about 16 bolts later out with the old and in with the newer, along with that came a power steering box to round out the front end. |
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09-26-2013, 04:42 PM
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#2 |
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Registered User
Join Date: Apr 2013
Location: Western Montana
Posts: 50
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Re: 1967 3/4 ton Cummins GMC
Ooooops here is some pictures first to start the thread!
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09-26-2013, 04:49 PM
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#3 |
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Registered User
 
Join Date: May 2013
Location: Sacramento, CA
Posts: 487
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Re: 1967 3/4 ton Cummins GMC
Very cool. Should be a fun project.
__________________
Rich J. 1967 Chevy C20 Longbed Stepside w/283 and 4spdSOLD  2002 Chevy Tahoe 4X4 5.3L SOLD 2015 Chevy Silverado Crew 4X4 5.3L |
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09-26-2013, 05:07 PM
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#4 |
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Registered User
Join Date: Apr 2013
Location: Western Montana
Posts: 50
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Re: 1967 3/4 ton Cummins GMC
Tear down and frame chop !!!
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09-26-2013, 05:10 PM
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#5 |
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Registered User
Join Date: Apr 2013
Location: Western Montana
Posts: 50
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Re: 1967 3/4 ton Cummins GMC
The only Rust it has is on both rocker panels and on the inside panels !!! The doors, fenders and cab ends are real clean along with all the glass.
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09-26-2013, 05:19 PM
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#6 |
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Registered User
Join Date: Apr 2013
Location: Western Montana
Posts: 50
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Re: 1967 3/4 ton Cummins GMC
I'm using a Sterling 10.25 rear end from a F250 diesel application and I will be regearing it to a 3 .07 ratio.
The transmission is an overdrive with a manual lock up from the 93 Dodge 1 ton 2WD and as soon as I get the block back from the machine shop the mock up will start! |
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03-24-2014, 09:05 PM
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#7 |
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Registered User
Join Date: Apr 2013
Location: Western Montana
Posts: 50
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Re: 1967 3/4 ton Cummins GMC
Well I made some engine mounts and mocked up the engine in and out a couple of times ! Tomorrow I will add the auto trans and start hooking things up! Not to forget to paint the frame and reroute some brake lines and other stuff!
I also have to do some removal of part of my front frame brace! |
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03-24-2014, 09:51 PM
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#8 |
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Registered User
Join Date: Jun 2013
Location: Norman, OK
Posts: 52
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Re: 1967 3/4 ton Cummins GMC
Looks like a great project. I would love to do a cummins swap on my 67' in the future. Do you plan to box/reinforce the frame at all?
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03-24-2014, 10:33 PM
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#9 |
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Registered User
Join Date: Oct 2012
Location: Newhall CA
Posts: 1,195
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Re: 1967 3/4 ton Cummins GMC
KOOL keep the pictures coming
__________________
69 SWB 780hp Hellcat powered, manual 6 speed, currie 9 |
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03-25-2014, 12:04 AM
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#10 |
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Registered User
Join Date: Sep 2010
Location: ND
Posts: 520
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Re: 1967 3/4 ton Cummins GMC
Count me in on this one.
__________________
Name: Les ---------------------- Couple 80s Couple 70s One 68 
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03-25-2014, 12:22 AM
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#11 |
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Registered User
Join Date: Apr 2013
Location: Western Montana
Posts: 50
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Re: 1967 3/4 ton Cummins GMC
I boxed in about 12 inches of the frame where the motor mounts brackets were welded into the frame! It is a 3/4 ton frame to begin with so it should be stout enough!
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09-08-2014, 10:05 AM
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#12 |
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Vintage 4x4s
Join Date: Sep 2010
Location: Prior Lake, MN
Posts: 4,305
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Re: 1967 3/4 ton Cummins GMC
subscribed! like the engine color too
__________________
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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09-08-2014, 03:41 PM
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#13 |
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Registered User
Join Date: Jul 2011
Location: Farmville, Va
Posts: 3,026
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Re: 1967 3/4 ton Cummins GMC
Lookin good
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09-08-2014, 10:35 PM
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#14 |
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Registered User
Join Date: Sep 2014
Location: Texarkana, Texas
Posts: 9
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Re: 1967 3/4 ton Cummins GMC
Subscribing. Looks like a cool project.
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12-18-2017, 08:59 PM
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#15 |
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Registered User
Join Date: Dec 2017
Location: Pryor, ok
Posts: 2
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Re: 1967 3/4 ton Cummins GMC
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12-18-2017, 09:01 PM
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#16 |
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Registered User
Join Date: Dec 2017
Location: Pryor, ok
Posts: 2
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Re: 1967 3/4 ton Cummins GMC
Just starting the same build on a 69 c -20. How did your project end up. Any help would be appreciated. Only difference is I’m wanting to put a 5.9 common rail and a auto trans.
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