I had a friend that ran iron eagles 230's on a 383", but with compression and about a 630 roller, it would run 6.70's/10.90's in a 3,000lb car and ran good. There was nothing done too the heads. He has since gone to alum heads and a 350" it runs about the same. All this on gas with a 750 double pumper. They are probabely the best iron heads on the market in my opinion.
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