Modify the cross member it is the best way to go. If you don't want to modify it your self buy mine already done with negative camber pins(negative -1.5deg) for only $150 done by IDB. As Simon says you can get away with leaving the crossmember and using the standard mount on the passanger side but you will have to bugger with the oil return. By the way you only have to move it 10mm outwards on the passanger side.