RE: 1973 challenger history question
Hold on! Sorry about this, but some new information has come to light. The latest issue of Mopar Action Magazine (page 59, April 2007) has a photo and a small caption about a Mannix car that was on display at the Mopar Nat's.
This thing is a '72 Cuda Convertible. They converted a 71 Cuda Converible front and rear ends with 1972 trim since there was no droptops in 1972. I never saw the show, so I am not the expert on this, but if there was a Challenger on the show it was in later years.