I did the same as Ironhead, I used a '79 Ford 250 (Dana 60)
with 8 lugs. Had to do the same as Ironhead on the mods.
(b-line,drive shaft, shock perch etc.). It is a little wider than the
original unit so I had the front rims reversed out 2" to
compensate for the tracking ! You can see a picture of
it in Classic Truck Mag. (Jan. 2007 / page 86). That will give
you an idea of what it will look like. The ratio is 3:54 &
Randy's Ring & Pinion makes a posi for it (had it installed
this last summer) ! Seems like a bullet proof unit to me !
Hope this helps, keep us posted on what you do !