I just ordered a set of 16.5x9.75 StazWorks dual beadlocks for my d60/14b f/f equiped Jimmy. I need to know what backspcing is recommended. I'm currnetly running 38.5x16x16.5 TSL on 16.5x12 M/T classic IIs I plan on running 42s once the 38s are worn (or sold). I have crossover steering, 7" spring lift and 1" body. May run a hi-steer setup in the future.