Would putting a smaller pulley on the alternator help with high loads like offroad lights, and stereo systems?

does anyone offer just a smaller alternator pulley?

I know there are full underdrive pulley kits, just lokoing for the alternator pulley.

 

Smaller pulley on alt is overdrive not underdrive.

Yes it will help as long as you don't go too small. If you drive around much with the truck in the higher RPM range expect to burn up alts faster. The smaller pulley isn't gonna help much unless the RPMs are above idle anyways.

There are smaller pulleys on ebay pretty cheap, I think 53mm is the smallest you would want to go with one that is also street driven pretty regular.

You are prolly better off doing the ad244 upgrade, cs144 upgrade, or getting a higher amp cs130(d) for it.