Concur on the column guard above. There were some made that could be riveted together that did the same thing, just no need to keep removing/installing it, would probably be handier for a vehicle more frequently driven. That is THE #1 way GM cars/trucks of this vintage were and are stolen...they break the column in that area. Those guards can be defeated, as can any anti-theft, but it will take time and effort, and cannot be done with easily carried tools. The column guard HOPEFULLY is a visual deterrent (no broken window in the first place) and stops those with a hammer from getting the truck.
The second one I feel is pretty foolproof, but more difficult to deal with frequently. Just swap one of the critical fuses with a blown one.
*Personally* I'm not a fan of anything that messes with wiring, as I see it as a potential failure point to leave me stranded, or at best guessing why the vehicle just died or won't start. Should be pretty foolproof to install correctly and not have issues, but that is not generally my luck.