Anyone have 15x10 wheels in the back

[donthekawguy]

I'm ordering front wheels (cragar delux 69 15x6) next week. As soon as I swap the rear to 5 lug I want to get 15x10's for the rear. I have a 66 fleetside. I will have to roll the lip I'm sure. Anyone know the backspace and offset and tire size that will work without rubbing? This winter sometime I'm dropping my bed off at the bodyshop for new wheel openings and bodywork so I guess I could widen the tubs at that time but I would like to avoid spending the extra money if I don't need to.