Pictures soon but here's the current update.
Took a few tries, but got the cb750 cable hanger modified cleanly to work with the 650 head and still clear the frame. I ended up cutting the push cable stop and having it rewelded a little bit further up and back on the arm.
Wiring is 90% done now. Pretty much took the old electrical panel and tossed it, old reg and rect are available if anyone in interested, they still work. Wired in the Acewell digital gauge, Motogadget M-unit, Motogadget M-lock, new reg & rect, Radiantz LED blinkers. Also rebuilt/repainted and cleaned up the controls, removed some wires that were no longer needed and cleaned up all the internals. I wired up the headlight to be constant on instead of switchable so now I have an extra switch in case I want to add something later. I Couldn't find a NOS red kill switch toggle so I just repainted it in red Testors model enamel. Now I just have to figure out how I want to route and mount the speed sensor. I could probably do something stealthy on the rear end/wheel...
Overall, very impressed with the M-unit, I think I could have probably wired the control switches with cat5 cable since it runs really low voltage on that side. I may test it and do that or something similar in the future. Would be nice to streamline the wiring even further. It comes with burly power cable that I may use for the starter solenoid instead. It seems overkill for powering the rest of the bike... I mean, it's a 6awg wire! Does anyone make an inline ATC fuse holder with leads that big?
Highlights of the M-unit:
1. disables the headlight until either I hit the starter or manually toggle the high beam.
2. auto cancels the indicators in case I forget to turn them off.
3. can be set to flash the brake light.
4. easy connection to M-lock
Sorry if that read like Motogadget's catalog. It really is cool stuff...just a wee bit expensive.