Repairing a 1965-1967 GTO Tach - Hot Rod Repairing the tach on this 1965 Pontiac GTO was easy, thanks to an aftermarket replacement that fits right in with the original instrument-cluster housing! Mastering GTO Restorations: Electrical Guide Mastering GTO Restorations: Electrical Guide April 17, 2015 by Pontiac DiY The wiring systems of the 1964– 1974 Pontiac GTOs are probably closer in complexity to a '65 GTO IN-DASH TACH INSTALLATION GUIDE 2-16-16 - YouTube Click to view on Bing2:30'65 GTO IN-DASH TACH INSTALLATION GUIDE 2-16-16 how to install wire up a tach tachometer the right way GM for 1967 GTO Classic Dash Installation of AC controller radio made easyAuthor: David MorrisViews: 2 1967 Mustang Tach Wiring Diagram | Diagram Visit the post for more. Rpm tach wiring 20 xaz capecoral bootsvermietung de u2022 rh bosch gauge diagram defi neutral safety switch wiring manual to c4 conversion ford mustang alternator diagrams click image for 67 chevy truck wiring diagram data c10 starter 1967 heater chevy tach wiring diagram diagramsuper 2 diagramssuper Tach Hook Up On 68 Gto - forumsey I bought a 68 GTO that has a MSD 6AL and a 8920 tach adapter. Tha tach is an aftermarket hood tach that he bought from Original Parts Group (KR00152). The way he has it hooked up appears right for a Voltage triggered tach but it does not work. The lights on the tach work so there is power. My questions are do I have the right adapter and is there any way to tell if a tach is a voltage or Wallace Racing - Wiring Diagrams Wiring Diagrams Wallace Racing . Index . 1957 Pontiac wiring . 1958 Pontiac wiring. 1959 Pontiac wiring. 1960 Pontiac wiring. 1961 Tempest wiring. 1961 Catalina, Star Chief 70 GTO DIAGRAM . 1977 Wiring pic 1. 1977 Wiring pic 2 . headlight vacuum diagram. fuel pump .