500 Inch Gen 3

The protruding cylinder sleeves are just BIG dowel pins to locate the head on the deck.
:rolleyes:

I don't know. Re-reading the description there are two styles of gaskets in the head, one appears for the deck and sounds like a conventional head gasket and the other at the top of the bores seems to be a metallic O-ring. Still sounds like a recipe for disaster to me. shruggy.gif