Back then I looked at the following, all convertibles .

Y2 Yellow , blk int , 4 spd (not 100% sure of the int color)
White , white int , console auto -( Used in Presidents Nixons inagural parade back then. And he had the buildsheet to prove it )
B5 blue, blue int, console auto
R6 Red , tan and white int , 4 spd
R6 red , white int , 4spd
B5 blue , white int , conaole auto
Red with black int, console auto(don't remember if this one was R4 or R6)

I'll update this as I pull them out of my memory banks

Others I know of
X9 , blk int and top, 440, 4spd , power windows - sitting and rotting away in a backyard near Portsmouth Ohio
B5, blue/white int , white top, 440 ,console auto, a/c car - near the Toledo Ohio area
B5 Blue, blk int, auto, near Findlay Ohio