Car or Truck tires?

[AngryPirate]

I have the original 15" wheels for my 1960 1/2 ton GMC (2WD) and I'm going to put new tires on it.

I think what I'm shooting for is 225/75/R15 (someone correct me if this seems off at all) because I want just a regular, old truck look; nothing extreme or out of place for this model and year.

While tire shopping I noticed if I looked at truck tires with the sizing mentioned above, they all seemed a little beefier than I was looking for. Based on all of the pictures I have seen of more original looking trucks it seems that car passenger tires might be more what I'm after.

So I guess what I'm looking for is some input if a. the size mentioned seems reasonable for what I'm looking for and b. if it matters if I use a passenger tire on a truck? I know that there are obvious load ratings and such that matter, but that aside?

Sorry if this seems like a ridiculous question, I just want to be sure before I get them mounted and realize this is not at all what I wanted or should have.

Thanks,
Scott