Check out the article in tech tips re:gm hei dist install into 235. Did that with mine, was one one the best improvements I made. Starts very nice has a smooth idle and good acceleration. The hei coil produces a very hot spark compaired to the coil/points dist. Hotter spark enables better burn of fuel thereby improving preformance ,you will be impressed! If you haven't change over to 12 V you will need to do that. Rather easily. I think there is info in tech tips to do that as well.