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BUSY BOLTERS Are you one?  The Shop Area
continues to pull in the most views on the Stovebolt. In August alone there were over 22,000 views in those 13 forums.
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| | | Forums66 Topics126,777 Posts1,039,270 Members48,100 | | Most Online2,175
Jul 21st, 2025 | | | | 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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