Hi Ron
Welcome! You need to look for the carb and manifold from a S4 Alpine. eBay is always a good source. You can also post a parts wanted ad here on this forum. These were a single 2V downdraft carb and intake that will bolt right on. Usually the carb is a Solex but you will find Weber downdrafts used too. You can do a search of this site to find more carb and intake info as it has been talked about before. Hope you can make it to Carlisle-there will be lots of Sunbeams there!