Sorry to impose on your thread but, Is 600hp on a 2 bolt main cap setup asking for trouble? I've heard in other threads that those numbers are right at the limits of a 360 block.
Maybe but what is gonna give you trouble is detination which will give you cap walk which will hurt the Main caps.
I agree that you don't have enough compression for a bigger cam.What is the compression of your combo?What fuel do you run at the track?What does the car weight etc....
This question is for the original person who posted the tread.