Firing help! She turns over but..

Something simple like leaving the key in "run" WILL damage the points, and can sometimes damage the coil or ruin the ballast

You have TWO power sources for ignition, one is in "run" and the other is in "start." Clip your meter to the coil + and read the meter while cranking using the key. You should have very close to "same as battery" and in no case below 10V

If you are going to keep points "at least for awhile" you need to get yourself a dwell meter and feeler gauges to set them. Dwell meters almost always have a "points resistance test" to show whether they are conducting "hard" or not. "It's been so long" I'll have to look up just what acceptable "is"

Keep in mind you MUST have a good condenser (in the distributor) to form the spark, and of course the coil must be good.

Don't discount "could be" a bad coil wire. Easy to check, the old school was less than 1000 ohms per foot means a good wire for resistance wires.

Check the rotor and cap for moisture, damage, grease, and "carbon tracking". Take a GOOD look at the rotor.