[jerry w]

When you say "brake switch" I assume you mean for activating your brake lights. If so, I used a pressure switch, connected in-line with my brake line. Step on the brake, and the pressure closes a switch. Got mine from Speedway.

I used an electronic speedometer, easier to calibrate. Once you install the sending unit, you can change gear set-ups, tire sizes etc and just re-program it. No changing gears in the tranny on the sending unit.

Regards,