hmmm I know where there is a old 360 laying in the weeds, so the differece is a 17mm axle instead of the 450's 20mm, will the 360 wheel/brake work? how about the chain guard? how much longer is the 360 swingarm?
The frame end (closed) part of the swingarm is the same - same bolt and everything.
The 360 swingarm is slightly longer, maybe an inch, but a 450 wheel fits in pretty good. You may have to finagle the spacers a bit. The axle holes in the 360 swingarm will have to be ground larger to allow the larger 450 axle.
(from Steve, maybe) that the chain guard might be a problem.
A 360 wheel/brake would bolt up to the 360 swingarm, and would probably work fine if
you can get the sprockets to line up (but there's no reason to expect they wouldn't).
I can't say that for sure, since I never actually did one that far - don't have a 360 wheel......
The brake is the easy part, you can make that work.
However, I successfully grafted a CB400T wheel and brake to a 450, works fine.
Sort of a description in here - http://home.comcast.net/~tbpmusic/id54.htm
My problem was the opposite - I used the smaller diameter 400T axle in a 450 swingarm - so I had to make a couple of collars to put around the axle at the points it went through the swingarm holes.