What Rally Wheels???

[the67Beast]

Because I am new to Chevy, this is probably a dumb question. I just do not know which parts interchange with what year models. Which 6-lug Chevy rally wheels will work on my 67 C10? I like the wheels in these photos, and because the axles are so short on these old trucks, do I need wheels spacers to get them out a bit. I expect they are 15 inch wheels and expect they are 7 or 8 inches wide. What all do I need to get this look on my rig?

Oh and what tire sizes should I be looking for for this set up?

Thanks alot!