I read the entire thread and found that I still have a question for someone that may know. I have a '70 F250 with a 360 that I'm pretty bent on keeping a 360 (366 only if needs be). I'm ditching the two barrel in favor of a Carter AFB 600 on top of a 1964 390PI intake. I'm having the heads done including hardened exhaust seats, new seals, shaved (yes I know to have the intake cut to match) to achieve 10:1 compression, port matched, bowls blended. I'll use the 343902 C/L with new springs and timing set (adjustable double roller). Not sure about which brand of headers yet but thinking of Sanderson flowing through 2.5" duals through Flowmaster 50's. Does anyone have any performance numbers for a set up like this? Obviously it's a truck that'll be used as a truck and not a dragster so I'm trying to get as much torque from the short stroke engine as I can.