This is a full size HEI distributor with a mechanical tach drive. Many Corvettes used a mechanical tach drive in the years prior to the development of the HEI distributor. Make sure you have fire wall clearance if running this in any Corvette that used a point style distributor. This distributor is approx. one full inch larger in overall diameter than the early style point style units.
COMPLETE DISTRIBUTOR WITH CAP, 65K VOLT COIL, MACHINED ALUMINUM BODY, STEEL SHAFT, NODULAR STEEL GEAR, MODULE, MECHANICAL TACH. DRIVE AND PICKUP.