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Click on image for the lowdown. 
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| | | Forums66 Topics128,206 Posts1,057,440 Members48,471 | | 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: Sep 2001 Posts: 29,270 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,270 | steve, 6107328 is a block casting code that is actually cast into the block. That code indicates a 1953/54 248 GMC block. The "engine ID or serial number" is pressed into the block after casting. It shows the engine size plus a serial number if the engine was installed in the truck at the factory; or, that pressed-in code is just the engine size if it was a factory replacement engine/block (as described by others in posts above). | | |
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