396/402 Valve Sizes

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396/402 Valve Sizes

OldCrLvr
I love my Chevy Chevette! | Posts: 16 | Joined: 03/09

Posted: 10/31/09
10:54 PM

My question has to do with valve sizing on the 396/402. Factory they came with 2.06/1.72, or at least my #290 heads came with them. With a bore of 4.145 are there valve shrouding issues? I have heard that the block has to be notched to clear the intake valve if you increase to 2.19.
1963 Chevy II SS
1970 C10
1971 Chevelle Malibu
2000 Z71
2005 Passat 4Motion

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