AFAIK the ‘93 doesn’t have a computer but I was looking a minute ago at ignition parts and the coil may be a problem. Not sure.
Batteries, eh? I didn’t think a lead-acid battery would be affected by EMP. Thanks for the head’s up!
I think the problem, on further reflection, may be more because the battery is in a potentially active circuit rather than just being there. So maybe disconnect the posts on the battery of a reserve vehicle?