Oh! And before all this I took the distributor cap off and turned the rotor and released it and it did NOT return to original location.
It only hurts once!
Assuming the distributor is the original, okay. Single point, or dual points, doesn't matter. It's time to operate. Not that hard...those things, like anything else get used time on 'em. Then need a little care. Probably either gummed up, or rusted.
Best to simply pull the distributor, to work on it. You need the practice anyway, right! Once it's on the bench, look at how the points 'plate' is fastened to the housing. Probably a couple screws...pay attention to how the parts are in the housing, so when it goes back together, it's right.
The part of the shaft, that the rotor goes on, is separate from the main shaft. Might have to be removed first. Under the points plate, will be the main shaft, advance weights, and advance springs. Look it over, and note how things are there. The weights 'pivot' on the main shaft, moving outwards via RPM. The springs control how fast. There's also 'slots' that limit how much the weights move. Hmmm, could that be the mechanical advance??
If there's any sign of rust, clean the rusted parts. See if the weights easily swing out. Usually lube the pivot points with hi temp grease. Doesn't hurt to do a thin wipe of that grease on the entire weight, to help hold down rust.
On the two shaft parts, you'll see the upper part rides, and rotates, on the main shaft. Clean that area of the shafts, thin coat of that lube, so it moves easily. The felt 'wick' in the upper shaft, is a way to keep it lubed.
Anyway, yep, advance is hanging. Just needs a look see.