too mild camshaft

My 2 cents too is at least a full point more CR too. I went 11.7 static after mill work and I am a little less cam than I think you are going to need to make 600 hp.

I am not sure at this point how much you would want to cust the heads if at all, and then you still need a very good gasket I feel like a cometic etc to seal her up. Maybe there is another option, but I think more cam and a little more squeze...