Speaking of brake light switches (which I was doing last time) my MG friends tell me that the screw-in type brake light switches that auto parts stores sell today have a habit of failing in old cars after just a few rides. It seems they can't handle the 3 amps the brake lights on old cars generate. The MG experts said the heavy-duty switches sold by Ron Francis Wiring of Chester, Pa., (www.ronfrancis.com) are the way to go. These switches can handle the load and last a long time.
Also, according to Larry Kennedy, of the Hudson Essex Terraplane Historical Society, if you use silicone brake fluid in your old car you may want to try a Harley-Davidson brake light switch, which is designed to work problem free with silicone brake systems.