Chevy 305 question - roller cam

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Cuse99

Master Mechanic
Dec 21, 2020
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Hello - I'm looking to build a 305 for fun for a future project. What year did they start making the 305 roller cam ready? I'm thinking it was 1988 or so. Thanks in advance.
 

DRIVEN

Geezer
Apr 25, 2009
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I believe the general rule is that blocks with 1 piece rear main seal are roller cam compatible. There may be exceptions. That was a mid-'86 breakpoint for 350, so most '87-up.
 
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86LK

Royal Smart Person
Jul 23, 2018
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86 for 1pc rear main seal, 87 for roller tip rockers, and centerbolt valve covers on el caminos
 
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