The Ford Barn

markdtn · 05-13-2025, 08:20 AM

I have an 8BA in a 2N Ford tractor. It has a 63A 10si Delco alternator (high amps needed for a Taurus electric fan-no room for a mechanical fan). I'm in the process of putting the engine in an 8N tractor so while it is exposed and I have to rewire it anyway I thought about using a Ford 3G alternator instead of the Delco to be all Ford. I see that the mounting holes on a small case 3G are closer to 7" spacing instead of 6 5/8" but other than that I don't see why I couldn't do it. Anybody else put a Ford 3G (or 4G) alternator on a flathead instead of the Delco 10/12si? I know I could probably put an earlier Ford alternator but I like the internal regulator to keep things clean looking. I would wire it with a charge light and a voltmeter.

05-13-2025, 08:20 AM	#1
markdtn Senior Member Join Date: Jun 2016 Location: Chattanooga, TN Posts: 164	Flathead alternator conversion-Ford alternator? I have an 8BA in a 2N Ford tractor. It has a 63A 10si Delco alternator (high amps needed for a Taurus electric fan-no room for a mechanical fan). I'm in the process of putting the engine in an 8N tractor so while it is exposed and I have to rewire it anyway I thought about using a Ford 3G alternator instead of the Delco to be all Ford. I see that the mounting holes on a small case 3G are closer to 7" spacing instead of 6 5/8" but other than that I don't see why I couldn't do it. Anybody else put a Ford 3G (or 4G) alternator on a flathead instead of the Delco 10/12si? I know I could probably put an earlier Ford alternator but I like the internal regulator to keep things clean looking. I would wire it with a charge light and a voltmeter.