Back in the 80's a friend of mine had a sweet '57 Chevy Bel Air....."Windy Blue"...he called it, since it was light Candy Blue paint. He was so paranoid about it getting stolen that he put anchors in 4 corners of the cement in his garage, and after taking it anywhere, he would anchor the car down with heavy chains....two around the lower control arms, and two around the rear axle. He had these big HD padlocks for the chains. He also disabled the ignition/battery/etc...He was fanatic about that Bel Air not getting stolen. And to my knowledge, he still has that car.