I recently picked up a 1976 Full Dresser with the intent of having it judged at the 35 year mark. Gives me some time to gather the missing items. I recieved with the bike a "RADIO CADDY" . It's got an AM/FM 8 track and a CB along with a voltmeter and oil press. gauge. There are no HD part #s on this unit and I can't seem to find it in my parts books. What's the deal? Orignal equipment in 76? Acceptable accessory for judging? Where can I find a parts breakdown & a wiring print?