Stockish 340 upgrades, cam needed

Cudafever said

Edit X head have a average cc combustion chamber of 74cc the SM heads have 64 so maybe only 10-15 cc dish would work just fine.

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I was thinking to mill the piston for zero deck and run a .039. 1008 head gasket. That will lighten the piston some. Lower the compression a hair also. Yes/no? Kim