72' Scamp.
My D60 is 45.25" width flange to flange. Backspacing is 4". I can fit a 325x50x15 drag radial with room to spare. I got my 31x13.50 BP tires to fit as well, but I have to deflate them to put them on. No biggie.
If I had to do it again (and I probably will someday) I would probably narrow the housing even further so that I don't have to tilt the tire/wheel so much to get them inside of the wheel well.
I also made some pin positioning plates out of 1/4" to move the axle forward and aft if needed. I got everything to fit with the stock gas tank. Took a lot of measuring and planning. I'm happy with the way it turned out
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