and does it cause any problems/weakness?

I am going to do a mini-tub on a 51' ford F1 so we can fit bigger wheels and tires, but am thinking that I might have to shorten the axle as well because the wheel has to have a lot of backside spacing because we can't come out any more in the front, and I'm not finding any 10" wheels with 8" backspacing.

Anyways, Ford 9" rear end out of a bronco.

Thanks.

Red