How do I make the 67-74 tach board work in a 1967 console tach?
The design of the 67-74 board will accomodate the console housing with some trimming of the board to the OEM shape without compromising the circuitry. The four wiring connections are straight forward except there’s an additional ground wire that needs to be attached at the larger hole at the 10 o’clock position (relative to the text layout on the board). There are two standoffs used in this application. Wiring color code from the tach to the car is as follows: Purple = +12V Green = Points (minus side of coil) Brown/Black = Ground Orange = Lighting One of the brass screws was somewhat close to both the +12v and the above mentioned additional ground wire, so it needs to be covered with electrical tape. See the 67-74 tach installation manual for additional detailed instructions on the 67 console tach installation.
