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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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Mod | | | Forums66 Topics126,777 Posts1,039,270 Members48,100 | | Most Online2,175
Jul 21st, 2025 | | | | Joined: Apr 2019 Posts: 10 'Bolter | | 'Bolter Joined: Apr 2019 Posts: 10 | When did Chevy change the oil groove on the rocker arms from inline with the oil hole to offset. On my '56 235 the casting numbers went from 5,6,7,8 and the oil groove is lined up with the oil hole. I also have a set that have 85, 86 etc. casting numbers with the offset oil groove. What year did the change happen? Thanks! | | | | | Joined: Jan 2001 Posts: 5,320 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,320 |
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Apr 2019 Posts: 10 'Bolter | | 'Bolter Joined: Apr 2019 Posts: 10 | Thank you for the quick reply! | | |
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