Checking Total Cylinder volume

[John Nechiporchik]

OK, Because the tech section is a little slow (Winter doldrums), I'll use this opportunity to keep you guys busy.
If a car is summoned to the barn for teardown, What is the process for tech determining the correct total volume (CC'S) to compare your results to.
Example, my LT-1 specs call for 51.9cc combustion chamber, .047 compressed gasket, .015 in the hole for the piston. Also, my piston has 4 valve reliefs with no spec for volume.
Do they account for the overbore and the gasket bore size when calculating your specific volume number? Then I assume the process is to check your specific parts to compare to that number.
I'm trying to learn /understand the process in order to comply with the requirement.
Looking for a little "schooling" here.
There are a few good calculators on-line to do the math given the appropriate data. Just need to be sure I understand how tech develops the target number.
Anyone know the valve relief volume? Per notch or per cylinder???

Thanks,
John