This is a tach drive distributor for a Corvette with K66 transistor ignition. This one came on a 1967 427/435 HP car originally. It is part number 1111258 and dated 6 M 19, December 19, 1966. I have not seen this run but it is in very good condition and spins freely but may need some service before installing it in a car. This will work on any Corvette with a mechanical tachometer using transistor ignition.