The simplest, most basic and probably least expensive to start with would be a points conversion kit from companies like Pertronix or the old Accel/Malory stuff if they’re still available.
They replace the points in the existing distributor, and if it ever fails, you can literally swap the points back in to get home.
Very handy if you go off of adventuring.
There will always be the argument for the Ford replacement, which was the Duraspark system.
I have nothing against it and actually use it myself. It’s an excellent system and if you look inside almost any modern electronic distributor from the aftermarket, you’ll see they have all gone to the Ford design internally.
But that’s where the quality and ease of installation ends.
The wiring is not actually that difficult if you’re well-versed in such things. But if you’re a wiring, newbie, or panic at the thought of having to crimp or solder, the Dura spark is literally the last system you would want to install.
Far too many wires.
A popular swap these days is to a retrofitted GM HEI style distributor. You can’t argue with their simplicity and good function, but they are butt ugly under the hood of a Ford, get in the way of far too many things, and you do still have to watch out for Cheap imported built stuff.
A body lift is almost a requirement, or you may have to trim the inner hood brace for clearance. Then, choosing an air cleaner becomes problematic.
Too many negatives for me, but a lot of people swear by them.
There are other options, but that’s a start. See what others have to say.