Chevelle & El Camino, V8, 307, 350, & 400 C.I., with warning lights, without A/CChevelle & El Camino, V8, 307, 350, & 400 C.I., with warning lights, without A/C
-3/8-18 NPTF-, V8, Chevrolet small block, with factory gauges & aftermarket or 1981-up cylinder heads... see more-3/8-18 NPTF-, 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)