Today was a warm day, and I decided that it was time to put them onto the tractor. Got out my jack, and my wheel dolly, and went to work. I decided that I would use 1/2" x 1 3/4" grade 8 flange bolts. Since I have been using never-seize on my original bolts, I had to wash everything with brake cleaner, so when I put Locktite on the threads it would hold. I torqued the bolts to 90 ft pounds, painted the backside of the aluminum adapter with a light coating of never-seize to prevent any galvanic action between the aluminum and the steel. I attached the spacers with heavier nuts than those that came with the spacers. These nuts are 1/4" longer and 1/16" thicker. They require a 13/16" socket. I torqued the adapter nuts to 90 ft pounds also. Put the tire onto the spacer, and torqued those nuts to 90 ft pounds also. The whole process took me about an hour, and that includes taking the tools out, and putting them back. Overall, I am very satisfied with the spacers, and I think that the additional 1 1/2" spacer is enough for my use. I can always put another 1 1/2" spacer on top of the existing one, should I ever decide that I need the extra spacing.