Control Arm Bushing Kit: 1970-72 Camaro Firebird TA (8) FRONT- USA made PolyurethaneComplete bushing set. USA MADE PREMUIM ENERGY SUSPENSION PARTS. This set is specifically 1970 72 F body. Note over the year owners prior or current may change a control arm or two etc.. from models through the 70's.. and different years have different sizes, but this kit is year specific and correct to start with. (1970 72 Camaro Firebird) has 4 uppers and 4 lowers. Uppers shells is OD 33. 5 33. 03 thinner OD . Length of shell 34mm. Lower Type 1: OD