1973 f350 dually wheel spacers
 

Hello, I have a 1973 f350 dually and the problem im having is i want to put larger tires on the rear but the axle is much shorter than newer ones so i need a 1 inch wheel spacer on the inside and i need a 1 inch wheel spacer in between the wheels. So my question is this possible if so where do i get them. I have zero experience with wheel spacers. Thanks