ps. So that we are on the same page, the bore centerlines are going to be Y-2.050, same as the #2 bolt....
Whoa! Sorry, bolt 2,10, and 12 are NOT on the bore centerline. I can't get that dimension off the head and will have to get it off the block this evening and get back to you with a y axis number tomorrow.
P.S. the bore holes in the gasket are not round- they're shaped like the combustion chamber.