Hello. New to the forum. I was wondering at what level of horsepower the trick flows become more advantageous over the RPMs. A lot of people are using the trick flow heads in the 550 plus horsepower level but how do they perform around 500hp. Would the RPMs have an edge in the lower horsepower levels? Where I am going with this is that several years ago I bought a 440 source 451 stroker kit and had a 400 block machined and prepped. At the time Edelbrock RPMs were the plan with 84cc chambers. I had purchased the 4cc flat top pistons for around 10 to 1 comp. Pistons approximately .008 in the hole. The Trick flows 78cc would be a half point higher approximately. Not sure when I will have time assemble and get solid numbers. Wondering how the heads would differ around the 500 hp mark. Going to run a roller lifters and a cam in the 230s 240s duration range @.050lift? I am wondering if I should go the trick flows even though my compression would be on the high side. The car is a 68 Dart will be 4 speed or t56 with 355 gears. May go steeper gears later. Maybe hit the track on occasion but main use would be fun street car.