8 3/4 springs on the cheap

Do you happen to know the offset on the wheels and do they rub the outer wheel well?
I am looking at these with the 27mm offset.

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I had some slot mags on my car from back in the day that worked with some pretty wide bias ply tires; don’t remember the specs. When I went to radial T/A s I had to change wheels. I found 4 1/4 to 4 1/2 backset centers the wheels in my 1970 dart.