MetalCloak 6Pak shocks are awosme. I have only put on about 500 miles but so far they ride and function are great.
MetalCloak's Floating Shock Body Technology (FST) is a unique design featuring parallel shafts extending from a floating body, centralized by dual opposing reservoirs; this feature allows for twice the usual stoke over typical industry shocks.
I did not install them myself but did get a chance to play around with them and they seemed very bolt on. That is for an LJ front and rear. TJs and JKs I beleive you have to weld on the rear axle. You may want a friend to help you out because the adjustment may take two or three hands.