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Mod | | | Forums66 Topics128,154 Posts1,056,834 Members48,456 | | 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 2015 Posts: 3 New Guy | | New Guy Joined: May 2015 Posts: 3 | Gentlemen, I'm new to the forum so forgive me if I missed this topic elsewhere. My 1971 350 has a casting # 3970010....it's a 350. BUT, the flat spot on the block in front of the passenger head is stamped 9.015 period. This engine was worked on 20 years ago by Pettis Performance in Hesperia but they haven't responded to requests for info. Is this "9.015" a factory number or maybe a mod number the shop put on it after grinding off the original?? or I am I looking in the wrong place??
Thanks for any help | | |
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