Great ideas guys. Thanks. To answer a few questions: I do not have a garage, I park in my driveway. I am leaning towards the lock cable to frame (hood to frame) and use a battery quick disconnect. Although I do have a tach, but I am a little unclear as to how to ground it? It is coming off an HEI ecoil, that has 2 wires that both act as tach, so one goes to tach in car, the other goes to the HEI. Are you saying by ground one of those feeds the car wont start?