Where to buy correct alternator for a 1969 340 swinger non a/c car

slantsixdan said
Old Car Parts Northwest has shelves full of new old stock Chrysler alternators. You ought to be able to get whatever amperage rating you want, within a few amps. See here for detailed info on charging circuit upgrades. If you're actually driving this car, upgrading to a carefully-chosen electronic voltage regulator is a wise thing to do. There are several ways to do it; you can rework the alternator control (field) wiring to go to the '70-up regulator (Old Car Parts Northwest also has a good stock of NOS Chrysler ones), or you can keep your existing field wiring and use an electronic regulator designed as a drop-in for the old points type. As with everything else, they come in a range of quality; I prefer this one.

And as I posted above, I've gone through a number of SMP VR-128. They don't hold up to the higher field currents which were normal for revised square backs, and now are all to common with run of the mill rebuilds in general.

If you go looking for new replacement rotors on-line, I think you'll find the same as I did. The selection is very limited. There may be wholesale sources I am not aware, but I beleive what is happening is this. Most 'rebuilders' just buy new parts that come from Transpo WaiWei. That's the rotor that gets used. Nowadays most put in new rotors regardless of whethe the old one was any good. This is faster, cheaper and lets them describe it as 'fully refurbished' or similar. They don't do their own winding and certainly don't care about matching stator and rotors. If they test, they spin it to high rpm and base the 'rating' on the maximum amperage they can squeeze out of it. Occassionally one still gets a parts store alternator that has a full test sheet with it. These only reinforce my conclusions.

The above is my conclusions based on my experiences and testing. They are by their nature opinions. I have posted some of my measurements earlier in this thread because I don't consider any of this SSS. Other people with different experiences and backgrounds may come to different conclusions.