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Click on image for the lowdown. 
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| | | Forums66 Topics128,014 Posts1,055,325 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 | The letter "R" is a big truck. Decode your serial #The block casting # will help identify the engine size, and the block casting date code will confirm the year. Maybe you got lucky and inherited a 261.
-Tom
1950 Chevy 3100 w/ 1956 235
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