The notches for the outer bumper brackets are not the only differences. The holes for the upper header panel are not present on Firebird fenders, and the shape of the opening where the headlight bezels fit is also a little different. Another thing is the mounting tabs for the headlight buckets are in a different location on a Firebird. DO NOT buy them if you want to use them on a Camaro, they cannot be made to fit without heavy modification............RatPack..............