A Watt's linkage is better, as Brian said the only drawback is the amount of room they consume... With a pickup, should be plenty of room to get one in there. Of all the rear end centering devices, they will do the best job of keeping the rear end centered under the car...

It controls side to side movement so horsepower is not a consideration. As for controlling lateral G's, I doubt a pickup would ever corner hard enough to do any damage. There are two bars to distribute the lateral load over, so they would by design be even stronger then a panhard bar...