Google "pedaljack", "autolock", etc. - you'll get the basic idea. Most one-size-fits-all devices are, naturally, fairly useless. but if you can fab something that fits your particular vehicle perfectly you're that much ahead of the herd - standard aftermarket devices have known weaknesses, no one's gonna wanna spend half an hour trying to figure out *** that homemade contraption is on your pedals and then proceed to attempting to defeat it. There is also the train of thought that if you went thru the trouble of making said contraption God only knows what else you've done around the truck - tricks like clutching in to shift killing the engine instead, reverse gear blowing the horn (quite impressive with a latching relay that open a solenoid that purges your air tanks thru a train horn), some even go to extremes by installing tear-gas cartridges in their vehicles or enlisting the services of s trunk monkey
In short, if the custom contraption appears to be well thought out the whole vehicle is automatically considered *****-trapped and highly dangerous, at least by someone who's not on **** or something.
Of course if someone really wants your vehicle they'll just show up with a rollback, especially while said vehicle is parked in an easy access area like a mall parking lot or something of the likes. That's where sat tracker comes in handy, along with a few key phone numbers - then you simply show up at their place of business with more and better equipment than they got and politely ask them to return what is rightfully yours
