4" back spacing works well with these rigs. That's what I have on my '88, and it's the same suspension/axles as your '93.
Anything less than 4" and the tires start sticking out noticeably. You'll find that most aftermarket wheels listed for these rigs only have 3.5 " or 3.75" of back spacing.
An 83 mini with stock brakes can accept a wide range of backspacing. When it comes to putting v6 calipers and LC rotors on you'll probably want to be about 3 inch backspace or so.
IFS lifts require 3.75 backspacing because otherwise your TRES or ball joints?? I dont know some IFS stuff will dig into your tires and cause immediate problems if you can even get the tire on.
I'd go with an 8 inch wheel and 3.75 backspacing. Do your really want to pay for new wheels and tires and not gain a little stability and width? Not to mention everyone knows tires look cool sticking out past the fenders