Yeah, Curtis.

I was trying to think of that method. I've read that here on RCU. That's probably the best way to do this. I'm sure the OP will be able to use this as well as many of us. I did the mount without grinding off the blind nut surfaces, but it was a pain in the butt. I read the 'countersink' method somewhere but just didn't remember the particulars. You only have to be carefull you deep you countersink. That should really help the OP out with his engine mount changes.

CGr.