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Click on image for the lowdown. 
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| | | Forums66 Topics128,083 Posts1,055,967 Members48,430 | | 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: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | F1226H I think these decode as (someone will correct me - I could be way off): F = Flint MI 12 = December 26 = 26th H = engine size and application (maybe someone knows) Here are locations for codes on many high-pressure 235/261 engines The head and block date casting codes will help in the IDing. | | |
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