thank you for the help guys! im going to try it with stock alternator battery and wires and just use the proper wiring for amps and speakers.

i read somewhere on here that the stock alternator is 110 amp, which means it would be putting out about 1500 watts. ive read somewhere else that the car alone without the audio system will need 400-500 watts. and i plan on putting about 75w to each of the front speakers, 150w to each of the rear speakers, and about 600 watts to sub. which is a total peak of about 1050 watts for the whole sytem. so correct me if im wrong but i should be completely fine with stock alt because i will only be putting 1050 watts to the system, leaving 450 watts free at all times, and even more because the system is rarely going to be hitting at full power.
is this logic correct? im not very good with electric at all but thought that all seemed to make sense