Question: I just got a rebuilt 114 amp alternator for my '83 Plymouth Gran Fury cop car, and the rebuilt unit does not have a ground post installed, only a hole marked GRD. The old alt does have the post and was grounded to the pass. cylinder head. How do i fix this? Can I just thread a screw into the hole and run it like that? Ground the casing to the cylinder head?? I've attached a pic of my old alt. - the new one just has a hole where I circled in yellow...