Well found out. There is 2 differant styles cups. One is steel. The conduit passes through it and a nut 9n back side
The other. Is cast alum and thicker. Uts drilled but also tapped. So the conduit threads into the cup and not the block that makes up the t cross
So all I have to d9 is remove the alum block

1970 pro street cuda.
1970 cuda convertable