Which alternator is correct???

[mjhcobra]

I am finally getting to wire the car now that the dash is complete and I have found 2 different cases for the original alternators. One says Motorcraft and the other says Autolite. My guess would be that the correct one is the one that says Autolite since the voltage regulator says Autolite. Both are the same in appearance and I can get both rated at 100 amps. Which is correct???

[Mark IV]

The Motorcraft cases started in 1973 so the Autolite is the one. There are diofferent "Autolite" back cases dependant upon build date, i.e. the "teardrop" back and the "round" center back. You really can't tell when on the engine but take an Autolite anyhow.