I converted my 455's dual point accel distributor with a Crane XR-I module. It was cheaper than replacing the points and condensor. They didn't have the exact kit, but it only took clearancing the heat sink a little to clear one screw. It has been working great so far...knock on wood. I have about 20 hrs on it so far. The kit was about 65.00. It also has a built in rev limiter. BTW - Pertronix wanted 300.00 to build me a custom kit.