I have a part # from Jeff's Bronco Graveyard... #22307. Supposed to fit 78-86 Bronco, 73-86 Ford truck[/QUOTE]
I bought direct from Moser these are Moser part number A31-74, F150 1974-86 (F-150 & E-150), 31 15/16”, 5 X 5 1/2” 9”
Moser doesn't list a bronco with 9" for some years and I know it was in my 84 bronc. These will fit what is listed under both part numbers. I can measure the housing they came out of to make sure they will work for your application.