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Mod | | | Forums66 Topics128,264 Posts1,058,355 Members48,485 | | Most Online14,466
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
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | It's not a 302. GMC had 2 different inline 6 cylinders, "smallblock" and "bigblock". The larger engines, I think were up to 500+ cid, were used in the 5 ton and up trucks. I remember seeing one a couple years ago at the Hoosier Swap meet. Thought it was a deisel, too. Then I saw the plugs and distributor. I'll check my resources to see if I can come up with some more detailed info on them. I do know that they were replaced in late '59/'60 (depending on model) with the 60 degree V-6, V-8, and V-12.
Bill Burmeister
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