Russ, I'll reply to both then get ripped.
Yes, wheels have been narrowed and widened by splitting them and re-welding. This happened frequently in the old days when there were very few wheel manufacturers.
The next one is more important . I accept .000." I work them until they are as perfect as I can. You are not driving at 55 here. Any time the tire tread leaves the ground it is bad. Everything should be as perfect as possible. I even spin rims before mounting a tire to see what if its off and by how far. Richard is dead on. A rim fits only on one spot on the car and one spot the studs. Make them on all sets of your rims and tires.
18" implement wheels from places like
www.Millertire.com do not have safety beads. That can also be welded in. (nobody said LSR was cheap). Hoppy from American used these at one time. I do not know that Taylor does. Good luck.