I asked the wrong question or at best it was poorly phrased.
What I meant to ask was given that a couple has the roof which provides structural rigidity is there as much of a benefit with putting them on a coupe as with a convertible?
1968 400 Coupe, verdoro green, black vinyl top, auto 1969 GTO Judge coupe, Carousel Red, manual 1971 Trans Am, cameo white, auto 1970 Buick Skylark Custom Convertible 350-4(driver), Fire Red, white top, auto 1972 Buick GS Stage 1, Royal Blue, black vinyl top, auto
