The clutch in my '57 LCF was completely frozen mid throw, mouse urine had seized the throw-out bearing to the input snout. Specs say 10-3/4 inch, I wanted a non-diaphram as was the original, bought one at the FLAPS for a V8 Belair with the same specs - works perfectly.

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