my last Monte Carlo was a 1978, when i bought the car i changed the column out for a floor shift column. they stole the stereo out of it the first time. The second time they came back with a tow truck in bright sun light and took the car. not a person in the complex we were living in even said a word or saw it. nothing was found of the car. the police called a year later to ask for the vin number because they had pulled someone over that had a car that looked like the description of mine. but the vin was coming up wrong it was 1 number off of the one on the report. police couldn't do anything about it and had to let them go. wouldn't let me come ID the car nor did they tell me where it was so i could try. if they want it they will get it. they defeated 4 different forums of alarms on the car to get it on the street. so you can do what you want the best alarm is a nosy window watcher living next-door. and cameras so at least you might catch a glimpse of their face. but now with Covid nobody will care if they see a person with a mask on walking to your car.