ok . i dont see anywhere for audio so ill post here. if someone has a prob. move to. heres the deal. i have a 91 and im lookin to replace all the factory speakers with aftermarket to be powered by an amp. my question is. what size are the speaker sizes. i think the doors are 4"s (?) and have no idea whats in the rear. its cold out so i dont want to try and take panels apart and break em.. i did the crutchfeild fitment guide and got nowhere. " no speakers avail"...