weight savings on a coil over ONLY conversion is about 11-12lbs.....approx 30lbs on a rack and pinion / coil over swap when comparing manual steer to manual steer (any brake package savings NOT included...can be done on either set-up).
not for everyone....but I have yet to talk anyone that would go back to the factory set-up after installing and driving a reputable rack / coil-over conversion.