Matt,

The truck/commercial clutch housing is the same within each of these sets of years: from 38-47 and from 48-53 and from 54-??

If you want to stay with your original-style transmission, it was the same from 41-47.

If you want to go with a 1948 or later transmission, you will need people to tell you about using a newer clutch housing with your engine (should be OK) and tell you about any tricks with motor mounts and enclosed driveshaft attachments.