If you have a SM420, you could consider installing a backup switch in the gearbox so when you shift into reverse, the switch is activated. Adding an alarm or horn to the circuit seems like a great idea.




Craig

My '50 Chevy 3100 5 window, '62-235cu, 3:55 rear
My truck ....... Respect The Rust
If I'm not working on my truck, '65 m00stang or VW camper, I'm fishing with the wife or smoking Salmon.