80-86 uses one version of harnessMy 89 F250 7.3 - replaced the Starter Solenoid, Positive battery cable, then the starter switch only to find the "notorious" melting plug.
I can just rewire but I saw your post - how much do you want for your harness?
Thankx!
Rob
87-91 uses their own version
92-94 uses their own too.
they don't interchange without major work.