So i would like to put some underdrive pullies on my blaze. But I am running a 1000watt MA audio amp with the stock alternator. So im thinking there is a large to larger chance that I'm gonna have some pretty bad charging problems. Anybody out there pushing that much power with the stock alt. and not having charging problems??

 

Search is your friend. We have had a few discussions on underdrive pulleys here before.

March Performance is the first name that comes to mind. You should be able to find pulleys on JCWhitney.com, Summitracing.com, etc, etc... They should also have a set that will include an overdrive pulley for your alternator so it runs at the stock ratio to the crank pulley (ie, not slower).

Good Luck.