I have 29x12.50x15's(29" tall 13" section) on my charger with a 15x10 rim. I have 4.75" back space, I would almost be better off with a 4.5" back space. I just ordered a set of M/T et streets in 325/50/15. (28" tall 13" section)
I can take some pics now or I can post some of the new tires.