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Click on image for the lowdown. 
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| | | Forums66 Topics128,017 Posts1,055,338 Members48,419 | | 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: Apr 2006 Posts: 506 Shop Shark | | Shop Shark Joined: Apr 2006 Posts: 506 | Block casting 3921968 should be a 250.
The head casting is listed as 3962084.
L138 is the date code.
L = month 12
13 = day
8 = year
-Tom
1950 Chevy 3100 w/ 1956 235
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