I had a 67 C10. Never needed a EMP to cause a break down....did that all by itself.Watched a show yesterday and it said 90% of cars will still work after an EMP, those that don't were cars with FOB's and high antenna's. But the chances on an EMP frying even the newer cars circuits were slim. Of course, one says this and one says that, so who do you believe? I have a 73 Chevy C10 and not worried about it during a EMP and a couple of newer cars but I did put extra Ignition modules and other components in small Faraday cages, just in case. Along with extra fuses which the show did say mat go out.