A pickup truck with a fiberglass cap would be ideal!.....
See? once an A while I get a good idea.... no matter what my wife says
ps... finding old pickup trucks down here is no problem... they're all over the place.
Yea, you probably want an old car, or even better a pickup to mount the system in. Otherwise, you'd probably kill your own car. It low frequencies, mag fields go through thin steel like as if it weren't there. The lower the freq, the better. Could be fun!