My task completed today (subject to off-pavement test run tomorrow) was replacing all (8) RE 5.5" lift control arms with MetalCloak's upgrade kit. Install instructions suggest "4-5 hrs" R&R time, however it took this old baby boomer 4 full days working solo on my back underneath but my compact 1/2" drive impact wrench helped greatly. The kit purchased included MC's "Lock n Load" upper front passenger side radius arm. I started with the fronts doing one arm at a time, measuring eye-to-eye when removed and replicated on the new MC arms. The rear upper arms have Duraflex joints with .4" bushing bores for 3/8" bolts at the frame end, however RE arms on mine were 1/2" "big bolt" versions which required .5" bore bushings. MC shipped those at no additional charge, which I greatly appreciated. IMO, a stellar business with customer service to match!
My buddy's 2003 Rubicon will be tested tomorrow as well, now sporting a complete new set of MC's 4.5" lift springs, shocks, bump stops and steering stabilizer, on which we completed R&R a few days ago. He likewise has the same complete MC replacement control arm upgrade kit yet to be installed but with a twist. His also has RE's old 3-link upper rear arm truss kit, which had the arms triangulated, converging to a bridge installed above the differential which eliminated a conventional track bar. With no equivalent new upper control arms available, we'll be removing the entire RE truss kit (OEM control arm / track bar mounts still intact), installing those same arms along with MC's adjustable track bar with raised bracket. Still lots to do...