more wheel stuff

[62 Longbed]

I'm running 15x8 , with 4 inch backspacing all the way around ... But as a side note .. I still have the stock drum brakes all the way around ..
235-60R-15 on front , 275-60R-15 on rear ..I think you would be on the right track going with 15x7 ft / 15x8 rear , since like you said with the disc brakes it pushes it out ... I'm still thinking about lowering 2 more inches on rear , but regardless I will have clearence all the way around .. Good Luck !!!