This might help. My brother just got done doing a set for his "beater" stang. Mainly he just did the exhaust bumps and cleaned up in the intake area. On his car with these heads and a unported GT-40 intake with stock cam, 2.73 gear,TB, MAF, BBK shorties, off-road Hpipe and flowmasters. He went a 13.97 at 100.78MPH. Not ground breaking, but gives you an idea what you could do for yourself. And considering the stock parts that are still on it.
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