^And that’s why…..insurance.
Aside from that, if one has to go through life fretting about breakins, robbery and auto theft? Move or keep up the insurance.
I’m 10x more worried about my ‘74 Jeep (although it has a 4 speed built in anti theft deterrent) and if I’m really sketched, I just pull the manual choke out, and 86 GMC.
Once the GMC is finished and being driven regularly to places it is more likely to get stolen, I’ll wire up a kill switch that is unconventional and not one of the commonly mentioned ones. It’ll be simple, easy, and completely inconspicuous.