Way to go Mick,
You done good. I think that was your best possible option. I use those things on everything. I'm not a darksider or a GM guy but I do like those alternators. I don't care if they are different, with a welder, a milling machine and a lathe I'll make 'em fit whatever I'm workin' on.

 

Dan,
Just for the sake of clarity here, I though it migh be a good thing to explain why the connections have to be as they are specified on the solenoid relays. If you have ever taken one of these things apart you will see that it is a very simple, and quite primative device. The mounting bracket supplies the negative connection for the coil and the small terminal marked "S" is the positive source for the connection. The contacts are the ends of the two heavy posts for the starter and battery connections. When the coil is energized it pulls down a simple copper washer to connect the two posts. If the solenoid has a small "I" terminal it is also contaced when energized. They make these things with and without the "I" terminal. When used, it bybasses the ignition coil balast resistor to compensate for the lower voltage during cranking. The more modern electronic inginitons have done away with the need for this terminal. You can use the older type withn the "I" terminal on the newer systems so long as you don't try to use the "I" terminal itself. If you have the old point and coil type ignition system with the ballast resistor you will need to use the old style solenoid relay. Of course the later Ford products have gone to the GM type starter with the solenoid being on the starter where it performed two functions. The same connections are on those starter solenoids.

This may not be of value to anyone if they aren't trying to mix and match parts from different systems, but I have been asked about this before. Hopefully it will help someone here.