If you wanted a 1/2 ton then having received a 3/4 ton is obviously a problem.
Otherwise a 3/4 ton is just as fine a truck, if not better in my mind. Nothing wrong with 8 lugs or having a little more substantial truck. And at least over here parts aren't anything to worry about, anything you need can be either had new from the regular auto parts store, reproduction from Jim Carter and the like, or the few items that aren't available from them can be found used.
Grigg