Les, I am trying to purchase a stinger S4 box with retard. I don't need & can't use the distributor, but will consider buying the whole kit if you won't break it up & price is reasonable. I have run one of these since 1984 on a 455 Buick. Those engines really like the 2% retard per 1000 rpm after full advance feature. Unfortunately mine was blown with a jump start.