[427sharpe]

That is very low, assuming the alternator itself is in decent condition and not on deaths door. What alternator are you running? I presume the used-forever-1G that Ford used all thru the sixties and seventies? If so, you may consider changing over to a new style Ford 3G, which is the common alternator now for the electronically laden, fuel injected cars and will supply power out the wazoo for our simple machines. They come in 93 or 130 amps, internally regulated and a very simple DIY install. Even fits the same brackets if you mind the case sizes. Plenty of articles/info out there on the net (surf 'Ford 3G upgrade'). Wiring is a snap and 93 amps replaces 60 or so in about 20 minutes.