THINK like a thief: MOST are looking for quick, easy and clean getaway auto theft with minimal difficulty. And while you can configure ways to prevent a thief from starting your CUCV, an experienced and well rehearsed flatbed wrecker driver can easily snatch your truck in less than one minute, making your non-startable tricks ineffective. My neighbor is a professional wrecker driver with 20 years experiance.
So because I still have my military issue anti-theft lock-n-chain in place, my preference is the steering wheel chain-lock method as follows...
To protect from being TOWED FROM THE FRONT ALWAYS, or as much as possible, park your truck so the FRONT end is not exposed to grab-n-snatch wrecker access. Why? Because your trans can very quickly be put in neutral with just a 9/16ths wrench & Crescent at the trans-linkage under your truck.
To prevent from being TOWED FROM THE REAR, when you park ALWAYS, or as much as possible, turn your steering to near full-lock when you turn off the key while positioning one steering wheel spoke pointing DOWNWARD where you will wrap your chain. Make sure your column locks. Wrap your chain and lock it now. The position of the locked wheels makes towing your CUCV from the REAR, difficult.
What this procedure does is to double-lock the steering making the vehicle nearly impossible to draw up onto the flatbed wrecker but also keeps the grab-n-snatch types at bay as well, because the turned front wheels cause the vehicle being towed to ride half-way into another traffic lane. Really difficult.
Also, the addition of a simple motion-sensing alarm is also a good deterrent because we all know thieves hate loud noises while at work.
A couple of my low-tech solutions that are not too inconvenient for my purposes. Hope this helps.