I have a non-fx4 4x4 crew cab. I like everything about the truck except the body roll and the wallowy ride quality. Would putting rear shocks on fix these issues or would it be necessary to do the ford performance shocks?
Rear shocks made a big difference for me. 100% recommend it. Made the truck feel more stable and less boat like. Doing fox up front really smoothed out the ride. I would start with the rears and see what you think. They are more affordable so if that solves your problem you save some money. If not you can dot he fronts and have a better suspension all around and only be out a couple hundred bucks on the rear.
I, like a ton of other owners here, only did the rears. That will get you what you want. If you decide you want to level a bit, or gain the extra 10% in ride quality, do the fronts later. I am still on the fence if I will do the fronts after one year.
If you're mostly on road or even into mild off-road, Bilstein 5100 would be a great middle ground and save you a bunch of money. I just did fronts and rears on my truck and it made the ride much more enjoyable. Still stiff, still feels like a truck, but way better than the stock pogo stick shocks.
I can vouch for eibachs in the rear only. Makes a huge difference for only a few $$. Full suspension would be even better, but for the money I'm happy.
Mine is a crew cab FX4 but that did not stop me from going to the 5100 mentioned above. Big difference! If your interested in a full set of FX4 shock instead, you can have my old ones (less than 3000 miles on them, just cover shipping). But that's only half the equation, IMO.
The " wallowy " part can be further help... a lot... is the addition of a sway bar for the rear. I have not added one yet but will this summer. Had 2005 FX4 extended cab Ranger that (like most Rangers) did not have one. Once added made a day and night difference.