That is not entirely correct, if you are referring to Firebirds. I have a '69 400/TH400 and the kickdown switch is electrical, and located on the throttle bracket. It is not under the dash on the gas pedal.
The .pdf file I sent is a 1968 underhood harness diagram showing the kickdown switch and detent solenoid wiring.
I will look for additional data for the kickdown switch wiring for the '68. Which engine originally came in your 2 speed car, 350 2bbl?
Vikki 1969 Goldenrod Yellow / black 400 convertible numbers matching
