Check this out ... I am inquiring about him adding an iPod interface to my Stock AM Radio in the Grabber. I asked him if his modification will mix stereo channels so nothing is lost when it goes through the mono amp and speaker .... this is pretty cool .... http://www.geocities.com/joesclassiccarradio/AUX.html
If you had an FM converter...you could then pick up the ipod with one of those FM broadcasting thingy's. I have one and I can play my ipod on ANY FM radio.
Keep your stock radio in the dash for looks. Plug your pod into a 4 channel amp mounted under the dash.