I had the head milled to make sure I would get a good seal on the head
gasket. I am using a Felpro gasket because it will be less likely to
fail and the people at the machine shop i took it to recommended it.
Most of the holes do line up, but the ones that do not are a few
cooling holes. The cylinder holes, head bolt holes all line up.
Looking up all other "compatible" gaskets, thay all have the same holes
as the one I have, Including an OEM gasket I found. I am doing this
from pictures, and can easily see that tey are exactly the same as the
Felpro one I bought. My thoughts are that the gasket covers some of
the hole in order to possibly restrict water flow and prevent the
gasket from failing the way it did before.
I also thought it may be a different, better design, but I don't know
if companies do this on gaskets. The engine code is B21A1