[theastronaut]

The main things aftermarket arms help with are adding caster, centering the wheel in the fender opening, or narrowed arms more fender clearance. They don't do anything to change the geometry for better handling unless you get Hotchkis arms that drop the upper control arm pivot point for increased camber gain but I think those are coil spring only.

You can redrill the locating holes in the stock LCA shaft by 3/4" to gain caster on the stock arms.