Relay and Neutral safety switch Question.

Got a question for the Electrical Experts on here.

I have converted my 1968 340 Barracuda from automatic to manual trans, bought a new wiring harness for automatic, have the proper starter relay for an automatic. My intention is to use a hidden switch wired to the Neutral safety switch wiring ,replacing the neutral safety switch itself for an extra measure of anti-theft security. I still want to use the dash mounted reverse light and rear back-up lamps.

Do you see any problems with this idea? Let me know what you think. Id appreciate any thoughts /ideas/inputs.