Stock that 460 was 365 HP at 4600 with 500 Ftlbs 2800 and it had 10.5.1 C/R with them heads . Now it's bored out .060 and I would think the heads have at least a .010 clean up cut . If that engine has flat tops . Your near 11.1 C/R now You may find some thicker head gaskets and open up the chamber CCs with some slight grinding . But it's to high for a street car the way it is .