[FUNFER2]

My iron heads with porting & port matching, actually flowed better than the advertized Edelbrock heads. Since I bought the engine from Carroll Shelby, which he built for customer to race, I wanted to keep it as original as possible. Other than weight savings & compression increase, the cost of the Edelbrocks and little possible gain in performance, did not matter to me. I would say with miled porting, there apx. the same. Spend the Edelbrock money on better shafts (and end stands), valves rockers ect.
My engine dynoded @ 536 HP this time. That's good enough for me on the street anyway.