CORPO,
I see your steering box is mounted inside the cab. Have you put a dial indicator on the frame and measured the cab movement when someone turns the steering wheel? If the cab is sitting on rubber pads there could be movement which could effect the steering...just a thought.
Also re-check the front end alignment, make sure you have some toe-in to help it track straight.
You're right, it's not my cup of tea...lol, but I love the work you have done, great craftsmanship...keep it up!
Mike B
