AMT made a 1970 annual Chevelle SS. It became a 1971 Then a 1972. AMT never removed the 1970 front side marker lights. ERTL turned it back into a 1970 , then again into a 1972. The rear bumper lost it's lower separate pan . now it's chrome and part of the whole bumper.
There were two AMT 1970 chevelles. kit with engine and the Motor city stocker. Frames different for sure.
The AMT 1970+ chevelles have funky sides. There is a a shape not found on the real car. MPC version is more correct IMHO. The Matchbox /early ERTL is the best. Grille is better and rear bumper too
Round2 1972 front grille is not good.