I plan on supercharging my 331 with low compression pistons with a main support i was wonder if i didnt do 4 bolt mains conversion how much boost i could actually put to it?
Boost has nothing to do with it the amount of power you make does. Different setups will make different amounts of power at different levels of boost. Boost is only a measurement of restriction. In short........you wasted your money building the motor. Your block will only handle around 500rwhp give or take. Have fun.