I use 16" 1991 Chevrolet Suburban wheels. Bolt right on the back but I built my own adjustable steering arm and tie-rod for the front (all Speedway Motors parts). So no spacers or anything, I have 1/4" each side. I liked the look of the wheels and I was able to mount my original 3/4-ton caps. Total cost for 4 was $80 at the local pick & pull. PM me if you want all the details.
http://good-times.webshots.com/photo/2071318780102454676foVBMK