This site shows how to do it.

http://purplesagetradingpost.com/sumner/bvillecar/bvillecarindexpage.html

How the hell is that thing supposed to do over 450 mph lol

It must weight 10 ton!

Long, long, long run up?

dont get me wrong thats some good work but a hell of alot of it there are far simpler ways of making a chain drive diff
i think id also want the bearings suppported top and bottom against lateral movement to rather than just the bottom half bearing lock up at 400mph could hurt slightly