I haven't really thought about this and it dawned on me today. I purchased an American Autowire Highway 15 kit and it includes a new ignition switch with keys but I wanted to keep the stock 53 ignition switch with the neat lighted bezel and keyhole. My car will be all 12 volts now and I'm wondering If I can use the original ign switch? Keep in mind that I am installing an inline 250 cu. engine from a 1971 chevy truck into my car. I'm worried about an increased load on the switch. Should I wire up a starter relay instead?