Chris M,
The best you can do with the Williams set of wheels is to use a good lubricant, other then that you will have to change out the complete truck assembly.
I have worked with many Williams passenger cars and they just need a good lube!
Do not try to mix or match sets of wheels for any Williams car. It will just add to the frustration.
If you add Lionel fast angle wheels but keep the Williams truck it won't work correctly for long.
Lee Fritz