[Lugnutz65]

Originally Posted by Isaiah92260

My battery is on its last limbs cuz I've been charging it too often because of my charging system. I've made a similar thread about that. I have the OG external regulated charging system still and I'm gonna go with a new internally regulated alternator, so my question is, what's the best 3-wire Alternator that I should buy for my 250 I6? I only plan on getting halogen headlights and LED taillights, then a simple radio system and that's it so I don't need a ton of Amperage, I'm looking for something affordable but yet that has a good low idle charging rate but can hold up when I decide to do my upgrades. This will be my long time daily driver so I don't need too many things. I know there has been a lot of opinions and suggestions pointed out to me, but if anyone can give me there suggestions on good alternators for me that are 10si or -2si 3-wire, please let me know here. Thanks, I'm planning on ordering it this weekend

I have a 250ci engine and I bought a nice 1 wire alternator from DB Electrical. They have lots of choices. I preferred the cast metal look but they have chrome and powder coated versions too. My high output 1 wire alternator was $67.67 delivered to my door. It works great.

I swapped the pulley with my original alternator so it would line up with the belt correctly. The old pulley is slightly larger, but the drop in output will be minimal. If your pulley doesn't line up then just make a new bracket or shim the alternator until the pulley lines up.

A very experienced Chevy guy on another forum suggested that I rotate the back cover of the new alternator so the wire post is farther away from the exhaust manifold. I did that and I'm very happy with the appearance too. Rotating the back cover requires minor disassembly and you need to make sure the inside brushes are not disturbed.

Here are some pics.