That is the case with automatic transmission cars, but the 4-speed and 3-speed cars do not all have the wiring in the dash harness for a console tach. If the car was ordered with the console for the 3 or 4 speed shifter, it still didn't have the wiring unless it was ordered with a tach in the console. The 3 and 4 speed cars had the same harness under the hood, so they have all have the brown wire to connect to the coil just like the automatic cars all had.