Hi guys

I've had a lot of slop in the steering of my 05 f250 for quite some time now. I recently replaced the steering box with an aftermarket red head steering gears box. Definitely tightened it up, but still didn't feel perfect especially over bumps so I installed a rancho dual shock steering stabilizer. Tht took care of the death grip I had to keep on the wheel. At this point it still doesn't feel right. The steering wheel still feels loose and doesn't return very quickly. I know this is common in these trucks as I own several but this one is the worst. Any ideas?