Never seen one completed??? Really??? Let's see.... My 39 Plym, 12v for 5 years, that was 20 years ago. My 40 Ford pick up, 12v DAILY DRIVER Flathead 60k miles in 7 years. R10 overdrive adapted into the torque tube with 6v solenoids running on 12v for the duration, no problems. Sold it and it is still going. 49 Dodge, 12v for the last 3 years, weekend driver but no electrical problems.. All of my conversions took less than a week to COMPLETE. If you do electrical add ons, it is really ok to go to 12v to support them. Sheesh