Help me diagnose why my head gasket blew

1wild&crazyguy said
Sounds like the rods aren't all the same length, which is common with resizing done by a novice or factory production type machinist.

That is what I was thinking also. They are aftermarket rods though, K1 H-beams, If I remember correctly. I think it was something that I would of had to ask to have done, with the machinist I took it to.