i have a set of rear disc brakes from a 96ls and i plan on putting it in my ek hatch i just got. i still have the old e-brake cables attached to the rear brakes. i have a 40/40 prop valve from a DA, what else is needed and is everything pretty much plug and play? and also, should i swap out the front disc brakes for ls fronts, is there a difference? any help would be great, thanks! im new to eks.