I got hold of one of these super pro sway bars yesterday.
But I am not 100% sure how to fit it.
So please correct me if I am wrong:
First u jack up the vehicle & put it on stands
Fit the chassis linkages on both sides loosely and connect the sway bar ends to these linkages making sure that the sway bar is also positioned above the axle.
Then put a jack under the axle on the Left to take the weight & undo the Left spring u-bolts,fit the new bump stop & sway bar mount (with sway bar), fit the new U-bolts & then do the same on the right spring.
Once everything is centered & even tighten all of the bolts & lower to the vehicle to ground & re-tighten to spec's.
I fitted one to a vehicle many years ago and didn't have any trouble but the axle was above the springs on that old slammer.