There is a guy selling a 2 bolt(with girdle) 351w bored and stroked to a 408. It has the best of everything except for the block(its not an aftermarket block). The block is a 74'. It is built for nitrous. The only thing i would have to change out is the cam because im wanting to run a 76mm turbo instead of nitrous. But what I am really wanting to know is How much boost can i throw at it to maximize horsepower before it grenades on me....and the motor right now as is has 9.5:1 compression.