this is CLASSIC TECH. Bob i would take the time to digest this real as it gets video tutorial , before you potentially maybe make a poor choice .......
hope this helps
matt
they do have moving parts inside , and do age and time wear and tear ......
you would not be wise to install a new alternator and Roll the TEq Dice on a 41 year old electrical part , that regulates the alternator voltage etc......
ask your self this question , then you have already answered...