Better rethink that decision. Unless something has been changed concerning the brakes, the 16" tubeless rims with the drop center won't fit over the rear brake drums on that dually rear end. There's just barely enough room for a straight-center 16" tube type rim to slide over the drums. The 16.5's should work OK, but I doubt you'll be able to run the tubeless rims on the inside of the dual rears. My 87 F-150 with the mid-60's GM 14 bolt rear end is like that- - - -I have to run tube-type tires and split ring wheels on the inside dual position for brake drum clearance. Later model trucks with tubeless tires run smaller diameter, wider drums.
Jerry
