[cobrashoch]

Only way to go. If your car gets upside down or roughed up in a wreck any positive wire can make ground to the battery if things get rough by just touching the chassis anywhere. Going the other way (positive) requires a much higher rated switch, because everything is running through it in load condition. Buy the way, my car has 2 switches in line on the negitive side, one outside the car and the other is in the cockpit and requires both for the car to fire. Another thing you might consider is a tipover switch on the electric fuel pump. Really cheap insurance to help prevent a fire in a wreck.