Ruben, just a std servo hooked up to a toggle switch with a 256 or 440 rod will work just fine. I'm assuming that you will also have a switch on the side, like the radio switch is, for the ignition kill? Just install another one inside that's hooked up to the same wires that go to the outside switch. A little soldering will be required, but it's not hard to do.
Suptter