Pertronix Distributor

My chevy 350 engine is making a loud wineing sound....What is it?

I Just got doing a lot of stuff to my engine, now when i start it up it makes this loud wineing sound...like WEEEEEEEEEEEEEEEEEE!!!! thats the best way i can discribe it.It gets louder when i rev the engine up.The year of the engine is between 71'-73'... I relpaced the intake manifold gaskets, value cover gaskets, put in a new water pump, new 100% aluminum radiator, new pertronix distributor, new fan, and new holley fuel pump! what could it be? I thought it could be the alternator belt making the noise, but im not sure. I need some expert advise on this one please!!!!!! REALLY NEED HELP FINDING OUT WHATS WRONG!!! Thanks