Man if you are nearly stock motor then just buy a modern gear reduction starter from Ford. I have had mine on my old 302 now for 4 years and it still works fine and its lifetime garanteed by the guy down the street.
Just ask for a starter from a 93 F150 with whatever engine size you have and an auto or manual transmission to match you bronco. Cheaper than the other options and it will at least be gauranteed for a lifetime.