I've *heard*, but not fully researched that there is either:
a) 2 different caliper brackets, with no rhyme or reason that are slightly differance.
and/or
b) there is like (1) year or so Ford hub/rotor combo (something like a '84, or maybe it was '86) that is different enough to not work.
I'm going completely off memory here, so don't quote me.
I've done this only a couple of times, and never had an issue. My current trail truck is running exactly that (narrowed Chev housing, flat-tops, small bearings and Ford hub/rotor). Bolted right together with no issue. The only time I ever did run into an issue was MANY years ago when doing a disc conversion on my first Scout D30. The recipe there was Scout (drum)knuckle, Scout (drum) spindle, Scout (disc) hub/rotor, Chevy brackets and calipers. I ended up having to beat/bend the brackets back to get it to all line up. I would never do that again, and that was before I knew better, but that set-up is still one I use and is currently under my race rig.
If you have a pull-a-part handy, try getting another hub/rotor set off a Bronco or F150. Or hit up the parts house and get one of the $35 combo specials and see if that works. If not you can always return it.
hmm, Parts America didn't show the combo for uber cheap anymore... not sure whats up with that. The cheapest I found was ~$75 for a complete hub/rotor/studs. Does look likes there's a year break at '86, then start back up at '88 to like 90-something... hummmm. Maybe a Ford guy can shed more light.
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