If you have the standard or deluxe factory wheel, no problem. The Tuff wheel is smaller in diameter and required power steering. There is a reason for that.
The manual box will usually go 5.2 turns, lock-to-lock; power steering 3.5. A simple way to test if you want the faster box in manual form is to take the belt off the power steering pump. If you're not doing a lot of parallel parking, you may like the faster box.
I split the difference on my '73 /6 and put the smaller wheel (with a fabricated hub pad) from a 94 Dakota. It ups the steering effort and makes it seem a little less numb.