man wish an in and out burger was close now i want try one!!
yes food is better than trinity..
head dome shape is that cylinders #1 enemy.
the bore size dosent make them to thin that cyl can handle up to 75mm bore no problem that is a myth i dont care who told you its not right.
the material the sealing o-rings are made of needs to be VITON if you cannot get a set let me know i can send you some. they are brown in color if you get black o-rings dont install them they are low temp trash.
the head lifted, from bad design, ate the o-ring, and the coolant coming into the motor and mixing with the high temps of combustion turned to steam and was very bad bad thing. that shocked the cylinder and caused the alluminum holding the nicko on to deteriorate and cause it to flake. the cracked transfer YIKES
i would demand a new cylinder, new pistons, all gaskets, and dome blanks.