I will be replacing the stock alternator on my 290 7.4 motor. My question is will a standard 1 wire alternator do the job? I just want to ask before having to climb into the engine compartment is all.
So long as you don't have an isolator or ACR in line between the output of the ALT and the battery.
Now for the three wires you won't be using. One is black and that's just a ground, one is red/purple and the other is purple. Both wires have 12V on them when the engine is running, Red/purple (all the time) and Purple when running.
My opinion, I would not change it
Edit: not change