The early big jobs may have used several types of brake booster. The Ford part number may be a clue but a person needs more information. Hydro-Vac was one of the more popular but they made a lot of different models. If a person knew what manufacture they used it would be a big help. I know Ford used Bendix and Midland as well as a few others back in the day. There are a few big job owners that frequent here and over on the Ford Truck forum. This outfit may be able to help.
https://brakematerialsandparts.webs....otoid=77364701