[Jack21]

I used a plain vanilla Delco 63 amp 2 wire unit (12SI). Delcos' in my experience have been drive 'em for 100,000 miles, replace the brushes, and drive 'em for another 100,000 miles.

The BAT terminal goes to the battery, and the Ign terminal goes to the ignition to energize the windings. There is a short wire on the side plug that goes to the batt terminal. Runs electric fan, heater, wipers, halogen lights, MSD box; plenty of juice, and no reliability issues whatsoever.

Have heard a lot of grief about SPF alternators. Don't know why, but the ordinary Delco might be an option.

Also used new Powermaster Starter instead of OEM Ford. 1/3 the size & weight, twice the torque, and 4x the service life. Cheap at $159.95. Summit.