1937 was the last year for a carbon throwout bearing. There is a difference in fork pivot position from 1938 when the ball bearing design came in.
You need a 1938-39 passenger car bellhousing and clutch fork.
Chevrolet went from 3/8” bolts holding the flywheel on to 7/16” in 1942, you need a 1942-54 flywheel, if using a 6 volt starter, or a 1955-62 flywheel, if using a 12 volt starter.


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