Tire size and info.

Just got a 72 Dart, with a 8 3/4. the leaf springs are in the stock location, wanting to fit a 28/10.5 slick under it,


Do I need to, mini tub it? do a relocation kit on it?

What backspacing to use?

Any info. on this? thanks what have yall guys done to get these tires to fit?