Well, let see. It's a truck......
First mistake was buying Ford shocks. They're crap. Buy some Bilstien shocks. They're stiff, but they handle awsome, you'll only feel a bump once. Could also be the type of tires you have, could be something loose, bad bushings... Dunno. I have a 98 with 113k miles, new shocks around 70k, and LT tires. I also have overload springs, but I keep a lot of weight in the back. Anyway, mine handles great. The biggest improvement was the Bilstien shocks. Highly reccommend them. Also check the bolts and bushings on the suspension