coilovers, stock suspension, different k member?

Stock k-member weighs 35 lbs. You won't save much there. You're going to spend a lot of money to gain little to nothing, in my opinion.

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.