I couldn't find rear shoes for mine, all the leads come back as obsolete, 15"x4" with two wheel cylinders per side. I cleaned up the shoes pretty good on one side, other side had no leakage. Works ok for now.

1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy