The "mini-HEI" is a highly modified distributor from an early 1980's Chevy 2.8L V6, the one with a centrifugal and vacuum advance instead of electronic timing. The housing must be shortened in a lathe, and a correct drive gear and oil pump drive has to be fabricated. There was only a couple of years of production of that distributor so you're tasked with finding a scarce original unit, or modifying an offrshore-built clone. I've made exactly ONE of them, and I consider the aesthetics of a small cap to be unworthy of the effort involved. The next "small-cap" distributor I make will have an original-looking housing with modern electronics inside, and will still use the rotating-housing vacuum advance system.
Jerry
