looking to upgrade my speakers and hopefully put a new head unit in. Concert II car. Not looking for any kind of system. Just don't want to hear the radio which is an EQ btw make noises as I accelerate and want speakers that arnt blown out and I can actually turn the music up. Ultimately I'd like to be able to make it plug and play to convert back to stock if need be. Do they make a radio harness that works like they do with newer cars? Just trying to see what all is involved or if I'm just overthinking things. Thanks.