...amp in the car? I was told to run wires from the front to the back where the amp is but not from where to where.

dude you are way better off chucking the factory amp! technology has improved so much since '84! the new stereo has a way better built in amplifier than that junk in your car.

do your self a favor and just get a kit and harness if you havent already so that your stereo fits perfect, not hanging out or nothin, and you dont cut your wires the ghetto way - it'll cost you like ten dollars! and you will save so many headaches.

then replace the interior speakers you probably have 5x7's all the way around but i would have to check to be certain -it would probably cost you 40 dollars a pair
you can e-mail me if you would like to buy these things i can ship them to you

buy a wireing harness mounting adapter kit from the storeinstall it in the dash along with new speakers because the factory speakers wont handle the new radio