'06 Century Drivabilty Issues

I've looked on these threads but it wore me out trying to find if someone has covered this yet. I have a '06 Century. It was a PAM fleet truck. I bought it with 778000 on the clock. I can't for the life of me get his rig to drive correctly. I have put new king pins, bushings, drag link, outer tie rod ends, steering gear box and new virgins all around and two three axle alignments. No matter what I've done, there still seems to be slack between me and the steers. I've done the turning lock to lock twice and then manually bleeding the gearbox. It wanders and shoots when driving on anything less than perfect pavement. I'm at my wits end. I'm tired of being worn out from wrestling this truck. It runs like a top and I'd hate to get rid of it, but I can't see me driving miserable for much longer. I bought this truck and have been driving it a year. Do all trucks drive like that?

 

New shocks, front and rear and on cab. Brand new steers. 110 psi. The spring bushings eyes/bolts have play in them. When I was replacing the bushings, there was play and the Freightliner dealership said that's was how FL are. It looks to me that the springs shift from side to side. It also feels like there isn't enough camber, but they swear it set to FL specs. Handles worse when loaded. There always seems to be an inch of play in the steering wheel. Doesn't sound like much, but makes for a long day.

 

I would know not what to look for in the tilt components. There doesn't seem to be any side play when grasping the upper and lower and twisting.

 

The bushings are brand new. The shackles seem to bend from side to side slightly when turning to check for play.

 

I'm in Southeast Texas and rarely go farther than 500 miles from base. Thank you anyway for the input.