I will never lower with keys ever again. I have coilovers upfront with custom upper and lower arms that narrows the track width. Custom hiem steering, and beefy sway bar and all new bushings. Rear I used to run Tony’s springs (which I like a lot and Tony is a great dude). I ran his springs with full Spohn rear and JDM offset with beef sway bar. i’m currently now running coilovers in rear.
I’m putting out all this info because I bought mine new 05. It was going to be a SEMA project but I went a different route. So I have done keys, spindals, springs up front and plus tried all the latest and greatest innovated crap that’s come and left throughout the years.i don’t know what your budget might be But I would never waste my money again on keys, springs, spindles etc.. Going with CO’s wasn’t expensive My setup is now fully tunable, rides great, no bumpsteer, I can slam it or bring it up a little bit. With the CO setup you literally throw the t bars and every thing away. If it would help I can post pictures of the install during and after. Where I‘m from is the mecca for sport trucking / custom builds and get access to stuff that people won’t hear about for years later or prototypes that don’t even make it to production.