Since my Century is my only car I was always worried about theft. I decided I could not replace the car for the price of an anti theft system. So I had a Viper system with back up battery and back up alarm installed. It came with a two way transceiver which shows if the system is armed and tells me if the car has been messed with or anything is opened and of coarse the alarm goes off and the ignition is disabled. If the system is somehow disabled by a thief the back up system goes off. The glass break feature alerts me if a window is tapped on. It has a little blinking light on the instrument panel to warm would be thieves when it is armed.
The problem I see with that is that no one pays attention to car alarms anymore. Most people don't even bother to look when they hear one.
But some of those features do have merit
I think lojack or similar is a good idea, as a 40 year old car (and car theft in general) is typically low priority to most law enforcement agencies. With tracking, it should make locating it a lot easier to have a chance at getting it back.
