Tech support & service is the best I've ever dealt with. Mark is very helpful, and knows what he's talking about. He posts here occasionally too
Both Hotchkis & GW sell "tall spindle" setups that use B-body spindles which slow the steering ratio, widen the turning radius, cause serious bumpsteer, etc. SC&C's package uses stock spindles with tall ball-joints to get a good camber curve while keeping the turning radius and actually reduces bumpsteer.
Hotchkis pushes their rear setup with boxed arms and poly bushings which are nothing short of horrible for binding up the rear end.