Quote Originally Posted by StraightSix
If you're getting 12v+ on the frame you have much bigger issues.

What it sounds like is really happening is that one of the other grounds aren't connected or don't have a good connection. Leaving one of the the grounds completely off should make the car not start. The ground from the core support to the valve cover heating up means that too much current is going through that wire.
lol, it grounds to the frame and to the tranny

should be all one wire...goes from the battery, to the frame and the tranny.