Wheels

[Manolin]

What is the best backspace measurement for a rim and tire combo that will not rub or touch the spring plate? I plan to run 16 in steel wheels on a custom rim, and was told by the wheel shop 4.5 is the maximum.
The wheel will be 16x7 in the rear and 16x6 in the front.

[JTR70]

Depends, is this stock 356 swing axle or a 901 arm trailing upgrade? I've heard it said that you can go as wide as a 7 inch at the rear of a AB or C if you get the offset dialed in.