In California, an employer may not employ an employee for a work period of more than five hours per day without providing the employee with a meal period of not less than thirty minutes, except that if the total work period per day of the employee is no more than six hours, the meal period may be waived by mutual consent of both the employer and ...
The ignition 12v now goes directly to the coil (passing the tacho and collecting $200). Then run a sense wire from the negative side of the coil (the side that connects to the electronic ignition/distributor) up to the signal input of the RVC tacho. That's it.
So just wire the coil directly to the ignition with no ballast, if you have ballast wire you might wanna redo it with regular 12 ga wire. As far as the tach, remember, electricity doesnt just JUMP out there, it has to be pulled by a source, so hooking up your tach on the '-' lead shouldnt be a problem for the tach.