Looking to buy/build 500-600 fwhp 360

To keep from affecting your engine parameters too much, I would alter the compression by getting a larger combustion chamber so you can obtain a near zero deck and have good quench. With nitrous and that much compression, you may need a custom grind LSA to get the most benefit out of your combo. I built a big NMCA SBF stroker for a customer of mine back in the late 1990's that had almost 14:1 compression and was spraying 400 horse Nitrous Works fogger on top of it. It's all in the cam.