[factorystock]

It appears you have the Chevy 10 lug system not the larger Budd 10 lug system. The Chevy 8 3/4 bolt diameter was used on the light duty 60 series, while the heavy duty 60 series used the Budd 6 lug or Budd 10 lug system. In this case, it would be cheaper and less time consuming to just have newer tires put on your existing rims at a truck tire dealer only business. One piece 22.5" Chevy 8 3/4" 10 lug wheels are out there, but not easy to find.