Shims will help the tyre wear but as said I don't think they will do an awful lot of justice to the way the car handles, 6 degree rear beam is expensive but it will be one of the best handling mods you will ever do to the car.

here is a shot of my one prior to fitting and a shot of the rear of the car once it was on, notice how straight the wheels now sit and they sit exactly the same when the car is on the tarmac




Luciano