I would say your Bronco had an E4OD. AOD swaps to older Fords are done all the time. Best to start with an 88 or later unit, Mustang, TBird or F150. Vans, Mark7 and Crown Vic's are fine as well but some have longer output shafts. That doesn't hurt much because the driveshaft will be too long with either AOD. The Tranny crossmember will need the modified and a TV cable needs to be fabbed.
Ken Collins, BadShoe Productions, How To DVD's specializing in Ford drivetrains www.badshoeproductions.com (banner ad below)