Originally Posted by KC8QVO

I would be tempted to drill and tap the crank, but from what I saw I don't think a proper size drill bit to cut the larger threads would get down past the original threads to full meat. That, and if I could, I don't have a left handed thread tap that size (I don't have any left handed thread taps period).

Replacing the crank would mean replacing the chain rings also. There again, I don't know what the BB size is. With everything else that's been "odd-ball" sized I would expect the BB to be a strange size also at this point.