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| Non Pontiac Motors in Pontiacs includes factory 403,305,350 Chevy, Buick V6, Also Pontiac Motors in non-Pontiacs! |
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#1
03-05-2005, 09:50 AM
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I got a 403 I'm Looking to build. I know that replaceing the Heads too up compression is a way to go. I Think I want to go with this piston here http://www.kb-silvolite.com/performa...tails&P_id=354 This will bump my compression a couple points. My question Is should I use the Factory 4A heads and mildly port them or Use a set of 455 heads. I got a set Of G head from a 455. This will be a street motor and I got a 2004r with 2500 stall. running 3.73 gears.
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