FWIW One of guys, on this site ( former Navistar Mech) Capri owner found a truck OPSU that worked on his car. I called Navistar with that number and was called back with a new # 1340777 yesterday. The description, OD sounded great <> 1 1/2" in dia., male thded stud for elec contact. I couldn't get thd type to block verified. He has 15 units @ <> $45 each. The contact is 1 505 243 7883 Todd at Roberts trucking (Navistar) ABQ , NM. This location is 90 miles from me so I couldn't do a "hands on" visual for part yet I just took of oil filter on mine and feel sure it would fit except thd in block
I just cleaned all elec contacts, wire brushed paint from chassis, fine steel wool brushed grounding cable ends including OPSU contacts. I only have a weeks track record so far, but OP has never dropped to marginal on gage as it was doing almost consistancely before.
Hope this might be of some help to someone?