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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: May 2001 Posts: 7,438 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,438 | If they are from a GMC truck there is a serial number stamped into the block on the right side near the oil pan. The first 3 numbers are the displacement of the engine. I don't know if car engines have this or not. | | |
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