If you are thinking in terms of airflow the price won't be worth the price of a new head gasket and the time to change it. ?If you have the newer intake manifold then you just about made up all the flow difference between the heads.
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Don't bother giving me "rep", I won't return it and I think it is stupid.
Gracie Barra Clearwater
Gyms in Clearwater, St. Pete and Port Richey
pm me if you are interested in trying a free class at any of the gyms.