Mine would be:

1970 Sport Satellite
383 Super Commando
727
3.55 8 3/4
Column shift
Bench seat w/fold-down center armrest
B5 blue
Black vinyl top
B5 blue cloth interior
PS/PB
AM/FM w/rear speaker
15" Rally wheels
Auxiliary light package

A kid that I was friends with growing up (he lived right behind me) had this very car in 1975 when we were 18 years old. After he let me drive it a couple times, I knew I wanted that car badly and he knew it as well. He was not a car nut type of person like I was so he didn't have any attachment to the car. To him it was just another car. In a matter of months from the time he bought it, he sold it to another kid from our high school without even telling me he was selling it (some friend huh?). Saw the kid who bought it driving it one time after that on Gratiot Avenue and never saw the car again. No idea what happened to it. Nearly 50 years later, I still think of that car regularly. I've never had such a strong desire or passion for any other car like I did/still do for that one. I've been looking for a duplicate of it ever since, even posting wanted ads from time to time but never found one. Now, at my age, I doubt I ever will.