Help me diagnose why my head gasket blew

72ScampTramp said
Bolts would be greasy if who ever put it together used moly lube which i hope they did. Just a thought if the pistons came out of the hole you may be above 10 to 1

Yes, I used Moly on all of the bolts. But some are dry and some look like they were submerged in oil.

Compression should be 10.1:1