Draglite's and D/R's
 

I need advice on rear Draglite's. I bought a set of Draglite's for the front from a friend, and I need to buy the rear's. I plan on running M/T DR's, not sure what size to buy or what wheel to buy. 15x8, 15x10 or 16's? What kinda back spacing?? I have no clue here. I know the calipers have to be ground too. Any advice is appreciated!