The Stovebolt Site Forums The Shop Area Engine Shop GMC 6 cyl engine 503? 426? found in junkyard- help

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.

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.

BOOK ON EBAY
http://cgi.ebay.com/ebaymotors/1940...941477QQptZMotorsQ5fManualsQ5fLiterature

MODEL INFO
http://www.olive-drab.com/idphoto/id_photos_gmc_afkx.php