Set of misc tools, mechanics wire, fuel line, spare upper & lower radiator hoses, heater hose, 1 gallon of coolant, ballast resistor, ECU (if so equipped), V regulator, fuel pump, 1 qt of oil, points (if so equipped), rotor, dist, 1 long plug wire, #14 gage wire (10ft), fuel filter. When you've driven these old Mopars as long as i have, you are going to break down, no matter how well you maintain them. Id like to avoid leaving them on the side of the road, or getting them towed if I can. Most of the above stuff is from my past experience. Maybe I'm a bit paranoid, but better safe than sorry.
Kinda makes for a full trunk when it's an e-body and you add two chairs, a cooler, and some display stuff. Add a pop-up tent for carlisle and a B body trunk looks like a great alternative.