Like that second post said, didn’t realize the link wouldn’t work till I posted.
The 93 may still have a computer. The others are certainly safe but you may need to put an emf cage around your batteries to be sure.
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!