PCM Ford Front ALL PCM Ford Engines

Stud size - PCM did both 5/8" and 3/4"  Current is 3/4"

The bottom of the stud (goes through the mount) is 5/8"

Bolt center to center on the base is 4" 

Trunion is 1" 

The dimensions of the part of the base that lays on top of the stringer is 2 3/4" x 5 1/2"