I think you`ll have to change the backing plates if you try to use the 2" or 2.5" drums. I would stick with getting the 1.75" drums machined wider. That should be the path of least resistance.
I think you are right. The only thing that concerns me is if plan on using the drums I have that the Yukon axle sticks out 3/8 further than the stock. I don't know what that will cause. If I pay someone to turn them out bigger and then test fit them and find out they don't work for the reason of 3/8 I will be throwing that sucker as far as I can throw it!
