Will I hit water?
I suspect you are grinding material for the rod clearance at the bottom of the cylinders to clear the 5.7 rod, is that correct?
I do not know for certain how far a water jacket would 'drop' down a cylinder wall but if you are grinding the bottom of a 'cylinder web' I don't think there would be water there although I maybe wrong. I think maybe a exploded view or cross section of a small block on the internet may help with seeing how far that water jacket goes down. Just a thought.
Dano,





