The 360 build that has more turns than Willow Springs

I've noticed that the range of 65-73 CCs of the #308 head show an approximate range of 3/4 point of compression from low to high.
An uncut stock block deck height should be consistent from block to block but probably varies a bit.
Pistons that sit at zero deck, .010, .015 and .020 below deck vary about .4 points.
There are a lot of variables in determining and choosing a compression ratio.