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Click on image for the lowdown. 
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| | | Forums66 Topics128,162 Posts1,057,066 Members48,463 | | 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!
| | THANKS!
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: Dec 2001 Posts: 215 Shop Shark | | Shop Shark Joined: Dec 2001 Posts: 215 | my old Moters repir book for 65-72 chevy and gmc mid size trucks list a 638 gmc v8 in the larger chevy and GMC trucks, dose any body have picture of one? | | | | | Joined: Feb 2000 Posts: 268 Shop Shark | | Shop Shark Joined: Feb 2000 Posts: 268 | Its a GMC 637 cid 60 degree V8 engine based on the old GMC Big Block V6 engines. iT replaced the Twin-Six V12 in the engine line up. It came in both diesel & gas models. many got use in boats. Gas version had 275 hp & 560 lbs. ft of Torque.
More info can be found on my site, but not much more, and no photos. | | |
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