That picture showing contact is of cylinder #3, it is the exhaust valves making contact.

The engine was mocked up with Stealth heads, they fit fine. When I got the TF heads, I was using the same thickness head gaskets, cam lift, and rockers, so I never re-checked PV clearance, so that's on me.

Seems like someone else with a 440Source kit would have run into this, not just me.

I'd be happy ordering the 4cc Icon pistons, if I could get an answer whether or not they would need to be reworked.