The Silver Special cars will have trim code H4A on the fender plate. They would also have a vinyl top in the matching boar grain charcoal vinyl as the seat inserts. Legendary Interior reproduces this material. The original paper build sheet would have a Silver Special notation on it. If you feel the interior has been replaced, this sheet may be missing, since it is usually tucked in the rear seat back springs.The standard Belvedere II trim consisted of a bright trim that followed the upper fender and door feature line.