I also have a 67 Camaro and just installed a Marksman M12A 2 way remote. It's great because it pages or beeps when my alarm goes off up to 2000 feet away. It also shows where on the car someone is messing with. Do a goggle search for this alarm. I paid $400 installed with a hidden kill switch, motion sensor, so when my windows are rolled down and someone sticks there hands inside my car, the alarm will go off. It comes with a lot of options, like remote start, trunk release, impact sensor and also a built in Temperature senor, So I know when my car gets cold and I could turn on the gargage heater . J/K. I live in Sunny So. California so I don't have to worry about that. But look into this alarm, because I had the same concerns and feel alittle better now when I park my car. If you want to get really serious about keeping your car safe, they also sell a GPS Tracking, which I'm planning on putting on my daughter's car without knowing. Hope this helps.