I have heard a lot of people say Ravelco Anti-Theft systems are really good. Here is a link:
Ravelco Anti Theft Device
Course, I don't know personally but it might be worth checking into.
My name is Lee and I live on a farm in South Georgia. I am currently going to school to be a Network Specialist. I really love diesel trucks especially Ford, my Grandpa and Dad both owned them and really loved em. The Super Duty to me is the best truck out there, I need it to haul farm stuff...