Rim size and backspace, housing lenght for minitubs?

I like the look of the wheel well on a dart but it does limit your tire size. Bad Sport, which b body rear end did you use? There are like 3 or 4 different lengths. I use a 5 1/2 backspace 10" wheel after I narrow the rear end to 48". I have a friend with a duster and I must say I'm jealous of his factory wheel tub.