Correct spare tire mounting hardware for 71 Demon

Do you need the parts for a disc or drum brake car. Disc are a different length bolt due to it being a 5 1/2 wheel. Also the board should be a small round one.
It is a NOM 340, so I would think its a disc brake car. I'm actually picking it up late next week. The board I ordered does have a small hole in it for the washer.
Appreciate the help.