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Click on image for the lowdown. 
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| | | Forums66 Topics128,078 Posts1,056,029 Members48,433 | | 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: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | 3837004 is a 235 block casting code used from 55-57. During those years it might or might-not have had hydraulic lifters. F523A F = Flint, Mi plant 5 = May 23 = 23rd day of month A = standard engine (not Powerglide) - in 56-57 it would have had hydraulic lifters all code locations are shown here date casting codes would confirm the year (block date code would confirm lifters) | | |
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