I just finished installing the Hellwig 7709 sway bar on my 2021 Ram 1500 Bighorn 5.7L Crew Cab 4X4 Short Bed 3.92 rear axle with 3,300 miles. It took me about 1 1/2 hours including gathering and putting up my tools. I used the middle hole after checking to make sure it was big enough, which it was. It was about 40 degrees F outside so I had to go in and heat up the Hellwig poly bushing with a hair dryer to pull them apart easier. I used some marine synthetic polymer EP grease , Omni Green Grease, I already had to lubricate the bushings rather than the synthetic grease provided. I also reused the hex head bolts to attach the brackets back to the axle, but had to make sure the bracket was centered for the socket to get on the bolts good. I took a short drive, it felt firmer, but really didn't test it out on some curves.
Tools used: 8mm socket, 15mm socket, 3/8 and 1/2 wrenches, and an 18mm 'go thru' socket with wrench, and a dead blow hammer to initially loosen the bolts.
I towed my 34 foot, 7500# GVW TT about 4 times this past year with a 4 Way Equalizer Hitch (square bar) and Air Lift 1000HD (inside the coil spring) 2,100# capacity filled to 45psi. I had about 700# in the truck bed each time and felt I needed a little more sway control. This Hellwig should do the trick.