Pin hole in cast iron head

My 452 heads have the entire short side ground out and flush where the pushrod bump used to be. .485" off set rockers moved the pushrod over, so that area could be filled.

I put a piece of duct tape over the opening on the port walls and back filled them with JB Weld (24-cure) they have lasted over 10-years and that's a nothing special epoxy.

Tom