I have qa1 coilovers in the front leafsprings ok in the rear?

[69greyghost]

Guys I have a car thats a street build that may see light track duty but I doubt it. So far it has a 350 and a 4 spd, tubular a arms qa1 double adjustable coilovers, sub frame connectors and a hotchkis big sway bar. Do I need to get coilovers in the rear or would an upgrade like hotchkis leaf springs be enough? I dont plan to tub my car but I am still open to the thought of it.