Does anyone out there have a NAPA parts book? I have two wheel cylinders, part no's 36009 and 36010 that I would like to know what they are for. They look like Early front cylinders but they have a 1" piston. I know stock is 7/8" and metallics are 15/16" but what are these?? Thanks for any help. Dave.. . Corvair Therapy mechanical repair light restoration