Speaking of air cleaners…

It sure "looks" like it would do the tin!
I'm curious on the hole. Would you just leave it open or dress it out some how?

I would dress it out. I don't think you would ever pass it off as original but would be better than a single snorkel. If you have the same air filter and the right size hole in the base it should work. I think the tins would fit unless the air cleaner is 67 or earlier or smaller, like a 318.