-3/8-18 NPTF-, all V8, Chevrolet small block, with factory gauges & aftermarket or 1981-up cylinder... see more-3/8-18 NPTF-, all V8, Chevrolet small block, with factory gauges & aftermarket or 1981-up cylinder heads which have a smaller sending unit hole (correct resistance and connection, produces accurate gauge display)
all (plastic connector ONLY, installs onto wires coming out of distributor from the magnetic pick-up)all (plastic connector ONLY, installs onto wires coming out of distributor from the magnetic pick-up)