Hidden Secret Stealth IPOD MP3 Stereo

My older brother had an AM radio hooked to a single speaker in the dash of his Polara, which still worked. He had a portable CD player that he had wired directly into an amp that powered a pair of 6x9 speakers in the rear deck. The amp was hidden under the seat and the CD player was one of those personal models, like a CD Walkman...it sounded fantastic. The headphone output was used with a mini jack cord from Radio Shack, with one end cut off and wired to the line in on the amp. I don't see why that wouldn't work for an Ipod.