Install a hidden line lock in the brakes that activates all 4 wheels.
You can't drag the car onto a ramp truck or tow it, let alone drive it away.
Ignition cut out switch that is hidden is good as well.
Move to a small town where there's all Chevys or Fords. No one will want to steal it, and if they do, everyone will know about it.
Seriously, if someone wants to steal it that bad, they will find a way.