-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 1st design: VIN ending in 00001 to 27372, alarm switch located in driver side... see moreall 1st design: VIN ending in 00001 to 27372, alarm switch located in driver side front fender & alarm horn located behind driver side rear fender (includes pair of light sockets, wiring, & correct molded connectors)
-O.E.M. made in Mexico-, all very early cars with "5752" printed on lower right of... see more-O.E.M. made in Mexico-, all very early cars with "5752" printed on lower right of original fuse block next to turn signal flasher (35 amp inserts into fuse block) ****NOTE: THESE VERY EARLY CARS HAD DEFECTIVE DASH HARNESSES THAT MAY FAIL AND CAUSE FIRE. BE CAUTIOUS NOT TO USE ANY COMBINATION OF THESE ACCESSORIES AT THE SAME TIME; REAR WINDOW DEFROSTER, POWER WINDOWS, AND/OR POWER SEAT****