Steering Problem on 76 2wd

[Wbruiser2]

My 76 F100 2WD's steering is acting weird and was wondering if anyone has any suggestions. The issue(s) are: when I make a turn whether it be left or right, I have to physically turn the steering wheel back straight. I haven't messed with the steering gear box. Some other issues are: when driving down the road and hit just a little rut or rough road and the wheel catches it, I go to correct it and the truck over reacts (if that makes sense), I turn it a little and the truck moves a lot and it take some effort to get it straight again. Some times I notice when making a left turn, the truck feels like it has four wheel steering...
I didn't notice any of these issues before I replaced the following (all in the same day):
Center link, tie-rod ends, wheel bearings, king pins, brake calipers, coil springs, and beam bushings.
Everything is tight and there is no play in the pitman arm or rag joint. I did the alignment myself and set the toe-in 1/8th". It drives straight, doesn't pull, and stops straight without holding the steering wheel. All the linkage is tight,
I think maybe that the PO tightened the worm gear to compensate for slop in the steering and maybe it needs loosened up now? Or maybe it's just worn out? Thanks.

 

[Mil1ion]

It is definitely a hydraulic/mechanical issue

Most ppl I see have turned the adjustment screw way too much instead of the way they are supposed to....in small increments

 

[Wbruiser2]

I think my king pins are too tight. I hit them with a grease gun again, loosened up the adjustment screw a 1/2 turn, and readjusted the wheel bearings. I jacked it up and turned the wheels and it seems ok, no binding and is pretty smooth. I took it out and the steering wheel still doesn't come back but it drives a lot better. I just have to remember to straighten it up as I come out of curve.