Correct way to measure piston depth?

The KB's would be close to 0 deck without milling and then if you have to take .020 to get the block to be square then the compression go's up in a hurry. Then if you do a clean up cut on the heads and they are around 58-60 cc's and a .055 gasket you'll have .030 for a quench area clearence. This makes for a very tight squeeze. In my 322 I'm at 11.24:1 with 59 cc heads and a .055 gasket with the pistons being .025 out of the hole. I'm pulling 190+ cylinder pressure. KB is showing the compression ratio to be 10.3:1 with a 57 cc head, but now if your out of the hole .025 then you can add about .8 of compression to that.
You'll have to cc the heads to find out what compression ratio that you'll really have. I also run the 1.60 exhaust valves in the heads and this closes the chamber down a couple more cc's.