[chrisbalich]

I'd advise having a look at the ignition system.
Plugs, wires, cap, rotor, capacitor/points (do 77s have these?

Smartphone, AAA card, 12v charger for phone, tire kit, 12v compressor, fan belt & tools, water, granola bars, and cash are all great ideas and things I generally have in the car with me at all times.

I have found that a yoga mat is an excellent roadtrip companion. More comfortable to lay/kneel on to inspect the car or work on it. And if you find yourself on the side of the road for an extended period of time, much more comfortable to sit on than asphalt or gravel.

A fire extinguisher is another great thing to have in the car at all times, not just road trips. I have an Element E50 in my car. Starts like a road flare, runs for 50 seconds, never expires, and rated for any fire an old 911 can start.

And I agree with the poster who mentioned to jump on Pelican if you get in a jam. This board is a great resource to get some helpful tips or connect with a fellow Pelican who lives near by. There are a lot of out there with tools and garages and a fair bit of technical acumen.