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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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| | | | Joined: Oct 2006 Posts: 40 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2006 Posts: 40 | I just bought a giant GMC 6 cylinder engine. I'm not sure what it is. the block number is 2191202. It has a rebuild tag from 1954. The block has a date code of F-?-3 (1943?) I think it could be a 426. I want to rebuild it or at least get it running. I need help figuring out what I have and where I can find parts.
| | | | | Joined: Apr 2010 Posts: 474 Shop Shark | | Shop Shark Joined: Apr 2010 Posts: 474 | Here's a little info not all what you asked for but a start.
The 426 GMC inline 6 appeared in 1940s 4x4 Cab Over Engine (COE) trucks made in Pontiac, MI. It also appeared in large GMC trucks in the 1950s.
[edit] 503
The 503 GMC inline 6 was more numerous than the 426 inline 6, but beginning and ending dates are unknown. The GMC 630 Series of the early 1950s offered the 503ci inline 6 engine.
| | | | | Joined: Apr 2010 Posts: 474 Shop Shark | | Shop Shark Joined: Apr 2010 Posts: 474 | | | | | | Joined: Apr 2010 Posts: 474 Shop Shark | | Shop Shark Joined: Apr 2010 Posts: 474 | | | |
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