Start with some decent rubber, then if you want to dive further in to it an Anti lift kit, uprated ARBs, TT lower arms, and coilovers with adustable top mounts can be fitted to dial out unwanted understeer.
Try the tyres and walk first conti contact sport 3s are great and the antilift kit can be had for about £130, if your still not happy a set of adjustable antiroll bars will sort you out.