Blair,
I havent had to prove the point yet with the hex nut in lieu of the spinner but cant see a problem as the hex nut is just inside the rim and have no pedestrian mangling bits.
I have another three years before presenting for pink slip but others may know if the spinners are an issue or not.
Cant help you with 8.5" and Torana suspension maybe Shelby 400 can add some light here.
Phil
