Hey car audio. Looking to run 2 12" 600w rms/1200w peak subs with a 1500w amp but not exactly sure if my 84 g-body can take it. It has a 63a alt and a red top battery from autozone. Do I need to pick up a new alt or extra battery? Tried to do all the calculations but not quite sure of them. Thanks for taking a look I hope someone could help me out.