Steve,

Here is a mounting kit for your year engine. The main advantage of the one-wire alternator is the simplicity, especially of the wiring.

You can easily tell if something is wrong by looking at your ammeter. The 3-wire unit would also allow for a boob-light indicator (that you could mount somewhere) to also indicate that something is wrong?

My 1-wire 12v alternator on a 1954 truck has been working fine for 10 years. It self-excites at about 800 rpm. Once it is "excited" it charges at all rpms. As Stuart mentions, when you start your truck you usually rev up beyond 1,000 rpm, so this is not a problem.

Tim

Some 1-wire alternator info.

1-wire alternator on eBay

Here's a simple wiring diagram (ignore the spelling - the diagram is good)