Please also consider what wheels you use. Rear spacing on most aftermarket wheels(for this application) will place the wheel/tire assy farther out than the factory wheels. Add a wider tire with a larger diameter to the mix and you can(will) have turning radius clearance problems which will need to be addressed with the cutting wheel, as described above.
STORMY: can you submit your ride to the MEMBERS RIDES contest, as described by Fred in his other thread? That thing looks badass!!