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Old 01-03-2013, 05:19 PM
blakethechop blakethechop is offline
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pontiac 4x heads

hi i have a pontiac firebird 455 with 4x heads 113cfm i want to port heads and have read jim hands book has any body ported 4x heads and would you do chamber as in jims book or would this lower cr i want to keep heads and would appreciate info should i use higher cr pistons smaller head gasket mill heads ?any help would be great. i live in australia so locating different heads is a impossibillity and dont want to spend 3 grand on new heads shipped from usa
thanks blake
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