I have a 1966 Chev pu with a 292 in it and am looking for a way to upgrade to electronic ignition to reduce the number of tune ups and improve performance. A local shop suggested the Crane XRi units but they don't fit in 6 cylinder distributor caps. I was told that any 292 distributor with electronic ignition would do. Does anyone have knowledge of this swap, and what do I need to do it? What years work?