http://pugetsoundvintagechevrolet.org/Programs/6%20cylinder%20engines%20with%20photos.pdf

This says:

A full pressure engine can be mounted in a 1931 –1936 car or truck by using a 1938 –1947 truck bellhousing. This matches the engine to the 1931 –1936 passenger and truck transmission.

Although my engine isnt full pressure though...hmmm...