alternater questions for b2600

i need to upgrade my alternater but i dont know which one is right.also what belts and bracket do i need to run that updated alternater on a b2600

does anybody know were i can look this information up at

To run what alternator? The gm one wire? If thats what you mean then you can use the stock belt and brackets, you'll just need to do a bit of grinding on the bracket for clearance.