Finally got the time to get those 906's off and do the measurements.
I'll take it from start so you don't have to go back:
440” bored .030
JE (5cc valve relief) pistons .012 under deck
alu .022 compressed head gasket
906 heads measured yesterday to 79cc
That gives me 10.94:1 static compression. Correct me if I’m wrong.
No signs of pingin on piston tops or in combustion chambers.

I have been running expensive alkylate 100 octane gas just because the cylinder pressure was close to 200 psi after I put the cam in.
(I lost my notes and I couldn't remember the compression ratio)

Before I removed the heads I redid a compression test and again got 190-205 psi (cold engine) on all cylinders. Intake and headers removed, all plugs out, "hi torque" cheapo mini starter.

How can I get such a high cyl pressure with Hughes cam HTL5256BS installed at zero?