I agree on using the Performer RPM on it for a mostly street car. My sons .030 over 400 is close to your build. He uses Eddy RPM heads with 10.6 comp but with the aluminum heads and the MP .557 cam it runs fine on 92 pump. His 400 is in a 72 Dart with 3.91's and he uses the Performer RPM with a 750 DP. His is a street car and it has the Dynamic 9.5 converter. It has run 11.40's in good air at almost 3600 lbs with him in the car. Sounds like you have a nice combo but I agree that without quench you are pushing it with that cam and 10.7 comp using iron heads. Good luck , Ron