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Click on image for the lowdown. 
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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: Mar 2010 Posts: 1,660 Curmudgeon | | Curmudgeon Joined: Mar 2010 Posts: 1,660 | F = Flint assembly plant
I2 = Calendar month 12 = December
0I = Day = 01
J0 = Check again, this may be JC
JC = Light truck with RPO 227
The above applies to 1958 to 1962 years.
Either a 235 or 261 engine (captain's bar).
Get the code behind the starter to determine year of manufacture.
Picture of engine helpful if you need more info.
"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."
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