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They will sit inboard of your stock wheels by about 3/4" due to the differences in offset.
I am not sure if they will rub on the inside or not, but some people seem to have used them without problems.
I put '93-'96 sawblades on my '85, but I used spacers. I had some 1 1/.4" spacers so I used those. They are wide enough to clear the stock studs, and worked fine for me. However I had the 8.5" front wheels and they were pushed as far outboard as I would want. I suspect the 9.5" like on the '91 fronts, would be a little too far outboard with that size spacer.