First, what size wheels are you putting on.
Tokico Blues are probably the best shocks for the money IMO. Don't forget about the quad shocks.
For springs, do you want a progressive rate or fixed? How much of a drop do you want. Ford makes a B and a C lowering spring, One is progressive. Also H&R and Eibach make good lowering springs. You should match the springs with the shocks. Also know that you should look into a set of CC plates and bumpsteer kit when you start changing stock suspension/geometry and wheels. I would also strongly recommend that at the minimum you inspect/replace the stock worn rear control arm bushings if not the upgrade the control arms. The rubber bushings when worn throw off a ton of deflection and you might as well address that while a the same time.