It's mostly complete less installing grips, a mirror, the new AGM battery and replacing blown bulbs.  Thanks for the heads up on the voltage regulator, MarkT.  The donor bike was wired for it but it was removed, and the 75 bike had an aftermarket regulator (Henter) that I did get installed, including a ground wire. 

Bled the oil pump, but I still have premix in the tank.  Got to ride it some yesterday, 5 or so miles to shake it down.  Vibrates a little, but it runs well.  I'll do some fiddling with the air screw once I'm sure the oil pump is working and get straight gas in it.   

Update - spent a few hours this weekend going through the electrical and lights. AGM battery is installed, and all of the light sockets have power! Only the tail light and one turn signal bulb were blown, all others including the instrument lights are OK. Buttoned all of that up, and fixed the speedo drive in the front hub. It's done now except testing the sleeper pipe, once we have a nice day.

Appreciate the help from everyone on this site, next project is assembling the modified 400 motor and building the mx version.

Looks great!

Glad to hear you're getting it sorted! turned out real nice!