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| | | Forums66 Topics128,012 Posts1,055,313 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
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on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: May 2013 Posts: 1 Moderated | | Moderated Joined: May 2013 Posts: 1 | Have a inline 6 engine casting # 3850817 C GM 21. The number stamped on block near the distributor is F0604B is this a 230 or 250 ? | | | | | Joined: Mar 2010 Posts: 207 Shop Shark | | Shop Shark Joined: Mar 2010 Posts: 207 | 66,
Go to the forum list and scroll down to the "Engine Shop". The first post has a lot of good info on casting numbers and some of those guys are experts.
Good luck.
Tom
1965 Chevy C10, 230 straight six, 2WD, 4-speed manual
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