Moey Squared

so i just recently finished restoring a 1984 z28 camaro and i love the damn thing. but as of late, my belt that runs from the alternator to the water pump and crank is constantly making a squealing sound. i just replaced the belt today with a 11a 1130 belt and when i give it gas or the car is idling it squeals. please i need some help, that squeal is driving me nuts. any help would be appreciated