Small Block & Big Block Chevy Specific - Porting



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JUICED96Z
07-04-2007, 04:55 PM
For those with a factory style GM bow tie aluminum head BBC and single plain intakes (mineis a Dart). How much ET did you guys pick up after porting on a N20 car or motor car? Whats tipical for BBC's?

Or how much did you pick up after porting on any factory BBC head?