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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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For helping keep this great
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| | | | Joined: Dec 2001 Posts: 215 Shop Shark | | Shop Shark Joined: Dec 2001 Posts: 215 | hay is there anybody that has any intrest in the huge GMC engines here is a list of engines I found in one of my old truck repair book pretty cool  all these engines were availible in bigger gmc trucks 478 ci V6 702 ci V12 637 ci V8 this engine was still availible in 72 would love to have one of these to tinker with | | | | | Joined: Dec 2002 Posts: 2,549 'Bolter | | 'Bolter Joined: Dec 2002 Posts: 2,549 | | | | | | Joined: Feb 2000 Posts: 268 Shop Shark | | Shop Shark Joined: Feb 2000 Posts: 268 | I was thinging that may be you were talking about some engines I have not heard of. the engines you listed were used from 1960 to 1974. You can find more in about them on my website, start here: GMC V6 & V12 Engine Data . | | | | | Joined: Dec 2002 Posts: 2,549 'Bolter | | 'Bolter Joined: Dec 2002 Posts: 2,549 | Jolly, I sure hate you lost interest, in the pre 1955 COE trucks. Man, I could only dream of, as much info., & pictures of COE's, as you have of the 60-66 trucks. | | | | | Joined: Feb 2000 Posts: 268 Shop Shark | | Shop Shark Joined: Feb 2000 Posts: 268 | Spanky, I didn't really loss interest in those trucks, just found some thing I liked more. The Website I started is now part of ClassicCOE.com , and the Old COE Trucks group has grown to over 450 members now. Yes I didn't have the info for those old COE trucks that I have found for the 1960-1966 GMC Trucks , but I did get something going for them onthe web, which has now been taken over by guys like you, which are much more an expert on those Old COEs then I every was. So Spanky, did you get one of those Old COE CDs I did a few years ago? | | | | | Joined: Feb 2004 Posts: 29,761 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,761 | Didn't GMC run some BIG inline sixes in their over-the-road tractors back in the early 50's? My uncle ran a big gas-engine tractor that had been retired from one of the local trucking companies back in the late 50's to haul the big boats he repaired. I can't remember much about it, other than it had a crash-box 4 or 5-speed trans and had to be double-clutched between every gear. It was a single-screw rig, with vacuum-over-hydraulic brakes, I think.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Dec 2002 Posts: 2,549 'Bolter | | 'Bolter Joined: Dec 2002 Posts: 2,549 | GMC, Had a 503ci., & 707ci. inline 6, back in the early 50's. | | | | | Joined: Dec 2001 Posts: 215 Shop Shark | | Shop Shark Joined: Dec 2001 Posts: 215 | hay Jolly do you have any info on the GMC 637 V8? seemed like your website was pretty sparse of info about the 637. also what is the diffrence between a 305c and a 305e? sorta a newfound interest in old gmc engines wondering if I could fit a 478 in my 46 2 ton  | | | | | Joined: Sep 2002 Posts: 158 knuckle head | | knuckle head Joined: Sep 2002 Posts: 158 | I've been told the 637 cube V-8 is an IHC engine.And Mack offered a 707 6 cylinder gas engine,it it the same one GMC had?
6 cylinder gas engines were as large as 1000 cubic inches built by manufacturers like Continential before Diesels took over in the 50's | | | | | Joined: Feb 2001 Posts: 4,095 'Bolter | | 'Bolter Joined: Feb 2001 Posts: 4,095 | awesome jolly wish i had the nerve to take one of them on. i have all i can handle now.
Ron, The Computer Greek I love therefore I am.1954 3100 Chevy truckIn the Gallery 2017 Buick Encore See more pix1960 MGA Roadster Sold 7/18/2017
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