How much would different heads help
09-24-2012, 07:50 PM
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How much would different heads help I have a lq9 with a tsp 228r. It has 317 heads with a mild hand port job and milled .015". Would it help out any to get a set of cnc ported 243 or would the gain be minimal. This is in a 1994 chevy extended cab.
