Rytie,
There should be a number 86mm through 89.5mm on the top of the piston, what is that number?
I assume this is a weisco?

Also what is the max diameter of the head gasket your using in MM (use digital calipers $10 a Harbor Freight).

If the pics shown are TDC it does not look like your piston is coming too far out, could just be the head, has it been modified or is it stock?