So im consedering getting some aftermarket wheels in the near future.I know the pattern is 8x6.5 but what is the proper back-spacing and such?

 

i'm using some 18x8 w 5" backspace on the back w 325x60's they fit fine and are tucked inside the wheel wells. don't like the tires hanging outside the fenders. don't know abt the fronts. running 16x8 w standard backspacing .