Originally Posted by Deve
Yes. Ford used an electric switch at the accelerator pedal, and Chev used a bracket at the Carb mounted so that the accelerator linkage hit the switch at the top of its movement.

http://www.fifthaveinternetgarage.com/overdrive_parts.php

The switch they sell can be used in either the Chev configuration or the Ford one. It is easiest to just put it under the accelerator pedal, but making a bracket for the Carb mounted one is not that hard.

Most everything you need to know about the R10 Overdrive is here: http://devestechnet.com/Home/HowTo#driveline

You NEED that switch. If you put it in reverse just once without locking it out first, you will have major damage. It's just not worth it to go without it.

http://www.fifthaveinternetgarage.com/pdf/relay_kickdown%20instructions_update.pdf
That switch is only for the kickdown function, and is not connected to the reverse or lockout functions, which are mechanically controlled as Jerry states.

Bill Burmeister