57 Chevy Lower Push Rod Kit

General Motors part # 3743570 Lower Clutch Push Rod Kit.

Kit Contents
1 Rod, 1 Swivel, 1 Retaining Pin, 1 Spring and
1 Cotter pin.

Assembly
This view shows the kit assembled.

Measurements
ROD : Overall length is 11 1/8"
Threads are 3/8"-32 , about 3 7/8" long.
Pin hole is about 7/16".
Spring eyelet is approximately 3 3/4" from center
of pin hole to center of eyelet.
PIN : 1 1/2" overall, 3/8" diameter with a 1/2" head.
SWIVEL : 9/16" cube with 3/8"-32 threads and
a 5/16" diameter x 9 1/16" long pin with a retaining hole.
SPRING : 3 1/8" overall length, 3/8" coils
COTTER PIN : 1 7/8" long x 3/16"

Applications Per the 1938-1965 Chevrolet Parts Book

0.787 ROD UNIT, fork push*
57 PASS

* NOTE : Consists of rod, swivel, spring and pins

Disclaimer:

Factory correct applications are your responsibility. GM made part and part # changes with no rhyme but a reason (no production interruptions at any cost).
Application charts are for replacement parts that were available at the time of parts book printing.
My observations come from the parts I have in my collection or other reliable sources your parts may differ.
If Factory correctness is your goal, do more research, join car clubs,
forums and buy an assembly manual if one is available for your Project Car (you won’t be sorry).
This is a fun and interesting part of the hobby!