Got it installed this weekend. MP is correct on needing additional assistance in getting the bar up and in place. I used a creep instead of a creeper :-) Close buddy and lots of beer.
I absolutely could not get it done by myself. It is a beast to hold up and install. The replacement bolts on the u-joints have short shoulders and end up being a little too tight. A thin wall socket works best.
The Hellwig instructions say to "press" into the hourglass rubber sleeve on the upper arm. It was more than a press for me. With everything greased, a hammer and 2x4 were needed then a 1/2 socket extension to get the sleeve nice and seated.
The front sway bar arrives on Thursday. We have 4000 mile trip coming up mid-July. Will report back on performance.
We did South Dakota and Yellowstone last summer. The winds through eastern CO and western KS made for two days of white knuckle driving.