assuming that you have a stock setup and assuming by pulley below you are referring to the power steering pump pulley you just need to loosen the adjustment bolts for the belt tension and slide it out of the way, very basic and easy to do. Here is the service manual courtesy of Harold B. https://www.firebird400ho.com/mdocuments-libra As far as your question about more than doubling the alternator output you need to make sure the wiring is sized accordingly even if you will not be using most of it with your current ad on electrical accessories, because someone else in the future might and burn the car down because of undersized wiring.