Eric and Madmax, you both seem to know allot more about heads then I ever will, But to answer the questions that Madmax asked. The max RPM would be 5500 (probably not likely) I would like to achieve 375 to 400 HP. Yes street only want a good performance street motor. (I have no intentions of track racing) The car is a 55 Bel Air, 3200 Lbs. Mileage would be good but I do not want to sacrifice power. I now have a 700r4 with 2000 stall torque converter.
I do not mind spending 900.00 on a set of heads that will work with what I'm trying to accomplish. I want to be quick off the line, with a constant torque up to 5500 rpm. I just do not want to get over sized heads and valves if I do not need them. I hope this helps.