Front Tire Wear
OK, I'M new here.
Regarding front tire inboard wear. The front tires are pointed in at the front. Toe in.
The tires need to be dead straight. I bought my X with 100K miles on it and had the same problem.
I moved the fronts to the rear and then adjusted the toe in as neutral as possible.
If you sight down the edge of the front tires looking at the rear tire and the trailing edge of the front tire is sticking out past the front edge of the front tire, you have toe in. It helps if you lay on the ground across the front of the truck looking aft.
Toe in is preferred for irregular road surfaces but is bad for tire wear, additionally if the camber of the road doesn't match your settings, it will feel like it is pulling to the right.
With the tires pointed dead straight it will tend to wallow a bit in the ruts left by heavy trucks.
I adjusted the tie rods on my truck to give me dead straight and then set off on a 4000 mile road trip,
no issues. I would like to tweak in a slight amount of toe in as an experiment but after driving over many different types pavement it may not be necessary. When you get on some big sections of freeway and you can see that it is flat, I can take my hands off at 70mph and it is straight.
If you don't want to do it yourself find a shop that does race cars and they should be able to get it right.
Also check the camber, if it is straight up 0 that is not good. Needs to be 1.0-1.5 degrees to give some good side bite and keep the front stable. The X-Runner is a 70 Camaro with a longer wheelbase. It is better built but will respond in a similar fashion.