Here are a few pics of their components.
rear truss
springs (compared to the Re 4.5" springs)
I have one of these kits sittin in my shop about to be installed also.
So Far I have installed the RK coils on my current RE custom bracketed long arm setup... some observations.
#1, the RK coils are much nicer than the RE coils, they handle more weight on the back without sagging, and provide a slightly stiffer but smooter ride on road.
#2, the materials used in the RK kit is way overbuilt. I mean I am not complaining, but the Solid Stock Arms, 1/4 Formed truss for the 4 link and brackets is very beefy.
#3, this is the most complete kit I have ever seen, comes with all brakelines, drop pitman arm, drop trackbar bracket and adjustable trackbar for the front. Shocks, Springs, Brackets Truss AND all of the hardware, bolts, grease fittings, etc.. Even comes with a Krawler Joint conversion for the pumpkin on you diff.... VERY NICELY DONE
#4. this is a complete kit, Claytons is alot of other mfr.s put together I have installed his kit and although nice, I do not like the way his lowers are attached front or rear, and the solid stock, just screams BOOTY FAB, I really like the design of the TNT kit, but again, it is not a full kit. however it has the best clearance of the bunch.
Yes there is alot of binding in a radius arm setup as the axle tries to rotate when one side droops and one side compresses, it is simple physics, that is why clayton and tnt uses rubber bushings at the connection points on the axle...