Hydraglide Brake Drum

Hi,
My '58 Pan has a Hydraglide front end installed (might not be the original one). The front brake drum that I just pulled off of it is stamped inside with 44110-48. Every reference I have lists 44111-48 as the correct drum for this application. What is the difference between part #s 44110-48 and 44111-48?
Thanks!

Do not confuse casting numbers with part numbers. They are not the same.
Also the bottom triple clamp is different for a swing arm frame. The rigid frame has the stem right in the middle of a round boss. The swing arm is offset in an oval boss.

Chris,would the lower tree from the swing arm frame change the rake on a rigid ?...Mike