Older Ford pickup with the mechanical 6.9 diesel and a manual transmission is a good choice - it can run on WVO and WMO, both of which will be in plentiful supply for a long time in an EMP environment and you can roll start it. You might not have to as the vehicle is made out of heavy gauge steel and the starter motor is also heavily shielded on that design.What would be the best vehicle in the event of an Electromagnetic Pulse? I'm thinking a small multifuel vehicle, so that it could be pop-started. The old M35 Deuce and a half seems like it would be a good candidate if it was much smaller and could be roll started. Some other candidates would be steam powered vehicles, which I won't link to here since there are many and everyone who is at least my age should have a good idea of what those are.
Edit: If used, this could have a terrific comedic scene inserted somewhere - the EMP hits an office building, the people working inside rise up from their cubicles, run out into the street and scream "freedom!"