Radio questions and speakers

Radio discussions don't get very far on here sometimes....most say "listen to the v8" but i digress.

Check out mymopar.com tools / reference section for the wiring diagrams.

It's entirely possible to wire in what you want, but it's gonna take some research and an engineering degree or some money.
There's at least one company that makes head units that look like the originals with new guts and all kinds of new features ( or you can send them yours ), but they are expensive.
The dash speaker is something kooky like a 3x7 or something like that.

Pretty sure you can pick up a dual post stereo for cheap that has an aux input and not have to worry about re-wiring the old AM stocker.

My car already had the dash cut for a newer single din unit so I went 80's rocker with it... 2 12's, 2 6's and 2 6x9's and a decent 400watt amp...not make your ears bleed but drowns out all of the kids crazy music at intersections with either exhaust from the 360 or the stereo...win win ;)