I agree with the stuff posted. keyboard build the engine to make torque at 1800-3000, then set up the drivetrain to roll in that range. I don't know if the magnum heads will work on those small bores. a roller cam would allow you to keep the dynamic compression up, along with velocity. You will have to juggle that with mech. compression to keep it from pinging. I'd question the 60 over for that reason. Low weights, good tolerances, high velocity, and max squeeze are the basic steps. I wonder if going with a smaller exhaust would help tune this combo (build torque down low)?
