I bought a 600 vacuum secondary holley for my mustang a while back. Now that I just about have the car back together, I am going to rebuild the carb. Any suggestions on power valve and jet sizes? This is my car setup: .040" overbore, B303 cam, Edelbrock Performer intake,85 stock heads (for now), 3.55 gears and a T-5 tranny. I'll be adding a set of heads in the next couple of months. The power valve currently is a 6.5 and the jets are stamped 299.