Mel, you can't swap those bushings between cranks. I've tried. It works for a little while but then they just slip and stop working. Loctite, center punches - nothing works. Maybe you'll have better luck.
I've been trying to get paz at 1977 to make some more since they have them made for their performance cranks but that was over a year ago.
I hope I'm privledged enough to be blasted by your monza... seems like I remember hearing you had one of those things now... Is there a build thread/blog for it?