Bruce, I wrote this some time ago when talking about adjusting the switch.
"I know I'm going to sound simplistic, but maybe this answer would work for you. the previous owner of my car eliminated the throttle switch. The switch is still there but the wires are just spliced thru solid to eliminate the action of the switch but make the firewall etc look original. With this arrangement you only need ensure that you have some accelleration on (even a wee bit) when you flip the dash toggle switch. It works beautifully, does great downshifts coming off the freeway and eliminates one possible hassle with the circuit. I drove mine that way for (7) summers with no trouble. "
Dave C.