Maybe not. But I've seen guys nearly cry over stuff like that.
The core shift was unacceptable.
I've done more welding on heads before I ever lay a grinder to them than I care to remember.
On certain SBC heads I used to mill away the top of the head above the intake ports from the valve cover rail back about and inch and a half IIRC and then weld the entire area and then start on the port work.
