My father has a big 'ol "buzz box" (I don't know the amps, but physically it's pretty large), and when I was a 17 year old kid driving my SB powered '71 Vega, that's exactly what I would use to make "Lincoln Locker" rears out of those OEM Vega/Monza rear-ends. Pull the cover, let 'em drain a bit, maybe shoot some carb or brake cleaner at it, let it dry a bit, and then have at it! Never worried about cleanliness, and it seemed to work just fine.