You probably worked this out already, but My KB 107s came in at .011 below deck on my LA 360. That's 2.3cc. Adding 5+8.8+62 that is a total of 78.1cc. At 4.03 bore, that makes a swept of 748.3------- and so (748.3 +78.1)/78.1=10.58 scr.
A cam with an ICA of 68* makes 165psi@137VP, pretty well on...