Is there a way to tell if a rear seat is for conv or coupe? I believe conv may be a little smaller? Is there a measurement or marking to distinguish between the two considering they are not attached to a car.

Thx

 

For 1970, There is actually three. Convertible(shortest), Sport coupe(Post)(No armrest Longest), Holiday coupe(In the middle dimension wise). Then there is the supreme which i believe is the same as the Holiday coupe