Whats the best thief protection device available?

[1969Mach1]

My car being such a old car and my love for it I make sure she never leaves my sight. If I go somewhere she won't be left unattended for more then a few minutes. And I will be able to hear her if she is started. Although I don't always like that feeling. I want to add a kill switch, possibly split it to two different locations, one for when I'm going to be away from it for awhile so I'd put it in my trunk or something along that matter, and one somewhere in my car. Maybe I'll just put a timer on my car, if it's opened with the alarm set a clock will pop up with a countdown from 30, and it will have an explosive sticker on it. At night I park my car in my garage though, lock it all up and then I put the minivan behind it. So if they want to steal my car they have to steal the minivan too. And it has a factory alarm that is alot harder to steal cause it has the laser cut keys and stuff, + it has a motion sensor, and I sleep right above it so I'll be the first to hear the van. Either way if they want my car that bad then they can take it. I have insurance and 50 years left in my life to catch them.

Sam.