one thing that is absolutely mandatory is you MUST make sure the drum retaining rivets allow the wheels of choice to fit flat on the drum mating surface. the factory wheels had a relief on the back side to allow this. a close up pic of your new wheels will tell if they will work on the drums.[personally, i don't think they will because even though they have multiple bolt patterns, the unused holes might not be large enough, or in the right place, to fit completely over the rivets] if not, you have two choices. spacers that are thick enough to go slightly above the rivet heads, or swap to modern style brakes as have been already suggested.