Yesterday I installed new felpro gaskets 1047 w/ new ARP bolts. I found a code on the the piston:
H518CP STD 321-0017-a
it has a small dish in the center and 2 slits opposite each other.
Today I did a cold compression test with no rockers and pushrods
These numbers are pitiful!
Now 5 and 7 I'm debating if I should retorque the cylinder heads bolts?
6 and 8 have carbon build up.
I then installed the valve train and found #1 intake lobe rounded out.