Thanks to all who replied. My '39 has the "WIDE FIVE." My goal is to set the car up with 1940 & later wheels & hubs. The replies I have received will be very helpful for me to do the conversion with not too much trouble.
Thank You all again!!
Since the hubs are not generally removed from the drum under normal circumstances I was considering it as a unit, but you are correct, he will need the hubs also.