I am curious to know from all you experienced engine builders out there how many cc intake runner should a 454 30 or 60 over run. Here is why:

As I just discovered my current 460 is toast, cut oil filter and it has a nice silver metalic color. I am picking up a 60 over 454. It has 840 closed chamber square port heads with stud girdles, full roller, forged crank, 4 bolt, alum howards rods, fulid damper, claims it is around 12:1 compression, cant remember intake, but is set up for a dom.

The motor was in a 79 Z28 with 4:10.1 gear and 29" slick running 11.20 off the brake pedal. I am putting it in a 72 camaro with the same gear and slick w/ 3500 stall. I am prob 200# lighter than the 79Z28, and was wondering what difference a head change would make. I think that a head over 330cc runners will be a bit much for the cid. I was looking to find about a 310 - 325 cc runner.
Am I correct in what I believe?
Please correct me if I am wrong.