Larry
the hole can be opened up larger then a 3/8 dia push rod. If you need to know just how much before you get into the water jacket I can check that to. It would be real easy for me to do/check with one of the heads I already have cut in half. Maybe this will get me off my butt and get my head back off my motor and get it sloted for my 3/8s push rods at the same time.?
The bottom side of the head has at least! a 1/2 hole in it to start with.
God doesn't like ugly.
