your talking about hub centric rims,
the factory rims on a sd are hub centric, and use this style lugs,
see how they are flat.
basically the rim centers to the hub
if you go with a aftermarket rim, they are more than likely going to use acorn style lugs,
which they center the rims, allowing the hub hole to be larger on aftermarket rims,
if you run the accorn style rims, then you will need to carry factory lugs for the factory spare if you plan on keeping it,
also the super duty's are the only vehicle i know that uses the 8x170mm lug pattern, i think dodge and chevy use the old 8x6.5 lug pattern
if you are worried about the gap in the hub with new rims they sell hub centric rings that fill in the gap, but they are not needed.
the blue ring, fills the space