I've been working on a linkage setup for some time. I have a type 4 with an original OPP shroud and found the hex bar setup to clumsy and kinda ugly. I don't want to bore you with details and such, so here are some pictures of my solution.
Here's a clip of the intial startup and the linkage in action. I'm using a Megajolt/EDIS setup.
http://www.youtube.com/watch?v=XHiaY4YjHwU
enjoy
pete