.. OK i'M LATE TO THE PARTY AS NORMAL. But I have the SCOUT BOX ON MY BRONCO . I did that swap about 12 years ago .
As I recall I used a 1980 Scout II Box .
& You have to have it swapped for rotation . As I recall you use a S10 GEARS in it . Mine turned into be about a 3.25 too 1 ratio.
PSC did my conversion. They are like in AZLE TEXAS ..SLIGHTLY WEST of FT WORTH.
& Yes I did have to buy a long drill bit to add another hole in my frame .
Mine works great now that I got used to it being so fast over a 6 to 1 box.