Featured here is a new clutch pedal kit for your 1957 Chevy.
Manufactured by California Classic Chevy Parts.
The following parts are included: Clutchpedal with splined shaft & arm, return spring & hangers, pivot sleeve & bushings, hardware and clutch pedal bumper.
I have added in a photo of installation kit and also the clutch pedal schematic from the 1957 Chevy assembly manual.
Everything under the dash up to the top of the push rod for your clutch pedal installation.