fastback interior carpet

i have a 68 forumla s fastback. when i took the interior out, the rear side panels were not carpeted. i bought a new carpet set from year one and it has what apears to be carpet for the rear sides. would this be correct for my car? the side panels now have a texture like paint or maybe even vinyl covering. almost like the suede texture on the dash.the rear seat also folds down. which way is correct?