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Labor Day Putting down your wrenches or time for
MORE wrenching? 
Plenty of places to share. | | Click on image for the lowdown. 
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| | | Forums66 Topics128,006 Posts1,055,272 Members48,418 | | 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 | My guess (wait for some one else, before accepting my guess):
F 4 25 H
F = Flint, MI
4 = April
25 = 25th day of April
H = manual transmission - 1957 truck engine (235)
I'll bet that over 80% (>90%?) of the people who have been assured (even by family members) that it is the original engine find out that the engine is from a different year. Owners and shops thought nothing about swapping engines to keep these trucks working.
Does it have 4 slits in the valve cover? (54/55 did, but the VCs were easily replaced)
Does the water pump body go above the bottom of the front of the head (54/55 did)? (post a photo - or email me a photo, if you want)
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