Hey Muzza, and welcome to Club Harrison !
You buy things the drifters call pineapples (maybe 'cause they're yellow!??!) which apparently allows you to change the angles of the rear cradle which in turn changes how the end behaves. their not real dear about $100 I think. I got a set for mine-just in case. I also bought a whole bunch of adjustable rear control arms which are very well made and gives you TOTAL rear camber, caster, toe and anything else you haven't thought of to adjust-worth the money by the looks of it.
Rog