Looking to buy/build 500-600 fwhp 360

Why lower the compression and use the cam that way?
I can use a bigger cam when the static compression ratio is 10.5 to 1, or so, I think? I can also mill the heads to build a little static compression back. The ported cc volume on the Edelbrocks will be 73 cc's. Looking for a pair of Trick Flow heads ideally.