My understanding is that the old mechanical regulators cost too much to build, with the moving parts and copper wire. So the new regulators are solid state anyway, even the ones that look like the stockers. The quick way to tell is to look at the bottom. The mechanical ones have a couple of wire wound resistors, and the electronic ones do not.
Electronic regulators will work fine with your points, and you're one step ahead if you want to go electronic ignition. Electronic Ignitions do not play well with mechanical voltage regulators. If I had a working mechanical regulator, I wouldn't change it unless I was going to electronic ignition. The solid state regulator won't show much, if any better performance gain.
When you change the regulator, it's a good idea to clean the paint, rust, or corrosion from the mounting screw area and use internal tooth lock washers.
ATB
BC