Cross-Country Road Trip in a '68 Barracuda

Depending how your 360 is set up, have spare points & condensor or ecu, ballast resistor, fuses & fan belt. You said you'll have a floor jack along, which is good- but plan ahead how you pack everything. Pack the spare tire well full of stuff, put the heavy stuff toward the middle of the car, luggage on top of that. Keep the jack, spare tire, and tools in the back where you can easily access them. Last thing you want to do is have to unpack the whole car on the side of the road in order to change a flat!
Oh, and make sure your paperwork is up to date- have current registration (and plates, of course), insurance cards, and a good old-fashioned road atlas in the car with you- you never know when your cell service will cut out right when you need directions... In the immortal words of Bugs Bunny; "I KNEW I shoulda taken that left toin in Albukoikie!"