I am trying to determine the maximum tire/wheel combo I can install on my Bonneville. Does anyone know what will fit comfortably on a 62? I was thinking 15x8 wheels with 225/60/15 up front and 235/60/15 in the rear. I have also been looking for adjustable air shocks or in-spring air bags to lift the backend a little - just to level or add a slight rake. Any ideas?Thanks