Made the change to 1970 and later alternator and voltage regulator on my 63. Should be an easy swap right? Well it would be if it were possible to get good replacement parts. Took 3 alternators and 3 regulators to finally get good.... make that "working" parts. That'll start you wondering about your ability to add one wire, and make one extra connection.... First was an alternator from Rock Auto. Not only was it the wrong part, it was seized up. Return was a pain, as they didn't want to pay return shipping, because I had ordered the wrong part. Which I didn't, they had it listed as what I needed, it was not, finally convinced them that well,, you know,, it was bad anyway... So wanting to get this little job done, I went to the local Car Quest. Took only a day to get the alternator they had a regulator. Put it together, no charging. Tested the alternator. Bad. Got another one. No charging. tested that one. Good. Tested Regulator. Bad. Hooked it up single wire with my old race style regulator for the show I wanted to get to. Got another regulator. Bad. Wondered if I was doing something wrong, so ordered the cheapest one I could find on Amazon, just so I didn't burn up something expensive. This one works !! First alternator made in Mexico, all other parts China. That was the longest half hour job I've ever tackled !!Doug63 Sport Fury ragtop