Front suspension suggestions for better tracking

MAYBE unrelated, but STOP THERE AND FIND OUT WHY? Something.........wrong bearing combo? Something worn in a hub. Oddball hubs, some "conversion?" THIS SHOULD NOT EVER BE NEEDED

Years ago I looked at a truck for a guy, one spindle had been replaced. Turns out there is a "light" and "heavy" duty, and he ended up with one of each, and the TOO LARGER INNER BEARING bore was slopping around on the back side causing problems. Had to "fix" it all over again---go out and find a correct one.
You are right....I need to make sure that I have the correct spindles. The technician mentioned that he had to put a washer on the botton nut after the recent alignment and I totally forgot about it. Obviously I need to start there before I do anything else. I guess I was thinking that maybe there was some variances in tolerances.