A: Master Cyl & Shoes & RWC 75-81 GM era - SPECIALDue to some limited major bulk buying .. we can offer this one off KIT for cars listed below. All New service parts for mainly 75 81 era GM US cars with factory .. disc Front and drum rear. Drum size is 9. 5 inch.. so its for GM F body ie Camaro Firebird between 69 80.. and GM A body.. so GTO, Chevelle, Skylark, Cutlass + and X body.. the Nova series. See the listing its NOT for the big car series. As different wheel cylinders are on the change over