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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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#83952 10/09/2007 1:51 PM | Joined: May 2007 Posts: 292 Wrench Fetcher | | Wrench Fetcher Joined: May 2007 Posts: 292 | About what would it take to drop a 5.9 or 6.7 cummins diesel in to a 60-66 GMC truck ? I'm interested in building another dually 4x4 only this time with a diesel engine but i'll still want to run the manual tran's. . . The plan: 5.9/6.7L cummins diesel, 6 spd manual tran's, gear driven transfer case, using a 60" cab to axle ford F-450 or F-550 chassie and axle's, dodge power plant cummins/6spd manual, gear driven transfer case 60-66 GMC cab. . .should be one tough truck. . . than you got solid engine solid tran's heavy duty chassie with spring suspension only reason for the ford frame and axle's. . . Mike  :confused_smile: :confused:
1962 GMC K3000, GMC-379 V6.
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#83953 10/09/2007 2:04 PM | Joined: Aug 2007 Posts: 42 Shop Shark | | Shop Shark Joined: Aug 2007 Posts: 42 | sounds like one hell of a vehicle except for the weak link,.. that six speed trans has been known to have syncro issues... just my $.02 from experiance. i have seen alot of them in harsh environments go out
~army truck | | |
#83954 10/09/2007 2:14 PM | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | Sounds simple enough, new truck, old cab...
Why don't you look at some of the medium duty fords, they have the 5.9 Cummins in them stock.
What size truck do you want, 1 ton, 1.5, 2??
If you go with anything over a 1 ton it may be easier or better to use the original frame and add engine, trans, and axles.
Grigg | | |
#83955 10/09/2007 4:29 PM | Joined: May 2001 Posts: 1,907 'Bolter | | 'Bolter Joined: May 2001 Posts: 1,907 | I saw a Cummins in an Advance Design (1-ton, I think) in a Shelton, WA truck show. I didn't crawl under for a look and didn't take photos. I wish I had.
1948 3/4-Ton 5-Window Flatbed Chevrolet 34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.
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#83956 10/09/2007 7:50 PM | Joined: Feb 2004 Posts: 29,868 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,868 | I've got a bunch of Onan/Cummins engines stashed away, ones that got pulled from UPS vans when they retrofitted to a different engine. They're already set up with a Chevy 292 mount system, and a stovebolt bellhousing like was used on late-50's trucks with the hydraulic linkage. It's also got a Chevy-spline 12" clutch so a SM-420 or a New Process 235 will be a bolt-on fit.
UPS used them, along with 292's and Ford 300's interchangeably in their high-cube vans. The Diesel is 120 HP at 3,600 RPM, with a turbo. The first one's going into a F-350 flatbed, replacing a 351 Windsor/C-6 automatic, and the next one will probably go into my 59 Burb with a 3/4 ton Dana 60 rear axle and a 3/4 ton IFS from a later-model Chevy truck.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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