Need some tire and wheel advice---Please.

[Johnny Danger]

Without knowing the actual offset and size of the wheels, it's difficult to thoroughly assess your "fitment". However, it sounds like the previous owner simply used a "sandwich" style spacer(s) rather than a hubcentric one(s). If that's the case, by virtue of the fact that there's nothing "acting" as the hub, I strongly recommend that you limit driving the vehicle with that kind of set-up, and get an appropriate set of hubcentric spacers .