Anyone here ever have their pistons machined?

TXstang pretty much nailed it.
One thing I never mentioned because it never occured to me: I've had these heads off the engine twice in 9 years and had them resurfaced to clean them. Even though the machinist said that he only took about 6 to 7 thousanths each time, It is possible that this added to the compression numbers by at least a 1/4 point.
The intake closing of the 509 may have actually been later that the Lunati. Since the cranking compression numbers went U P with the Lunati by an average of 3 PSI per cylinder, this is likely. I had a heck of a time finding actualy reliable data on the MP cam and the intake closing. RRR tried to help and his efforts are appreciated. It just worked out that the cam he suggested gave both more cylinder pressure and more power.
I did pull the heads. They are in the shop getting ported. I brought gaskets for port matching. The man is also blending the bowls and unshrouding the valves. It will get a valve job afterwards and I asked to have the chambers cc'd so I can accurately guage the CR. My goal is to get around 10 to 1 compression and 180 or lower cranking #s. Currently my average is 191. The stock 84 cc Edelbrock heads will surely check out at less than 84 ccs now since they will have been surface milled for the 3rd time. The .075 Cometic MLS would take it to 9.89 with an 84 cc head. If the heads are milled to the point of now measuring 82 ccs, the CR comes in at 10.05 to one. I could live with that.