Harnesses (harnii, as Gary would say) are pretty modular.
Optional modules like interior lighting group, power windows and locks, etc.. just plug in to the 'base' harness.
You'll obviously find a different harness in diesels because there's no ignition at all, but there are glow plug relays and warning lights + dual batteries.
So, you're looking for a non-brittle fuse panel
with the harness attached?
Or your mechanic is going to try and re-pin your panel without crumbling it to bits?
There are three connector at the fuseblock: 1960, 1961 & 1962..
Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.