The 637 v8 gas replaced the 702 v12 in 1966. This low rev motor( revs at 400 rpms idle) was manly used in the fire apparatus application but was still offere.. Here you can find GMC gasoline V8 60° 637 CID (10.4 L) engines technical specifications, engine oil capacities, and repair data. garage.wiki is a community driven DIY car service knowledge base. Decided to service or overhaul your GMC gasoline V8 60° 637 CID (10.4 L) engine by yourself? Here you can find GMC gasoline V8 60° 637 CID (10.4 L.
GMC 637 engine. General engine tech -- Drag Racing to Circle Track. Moderator: Team. 11 posts • Page 1 of 1. econo racer Expert Posts: 793. 2022 5:00 pm h60-degree V8 based on the GMC V6/V12 architecture. The 637 replaced the 702 V-12, and was made in gasoline and diesel versions.. Learn more about this very unique engine, GMC's 637 cubic inch V8 that was produced from 1966-72.