While the buckets are the same '37 through '39 Standard, the 78 lens is specific to '37, and the 81A lens to '38 and '39 standard. The '39 DeLuxe bucket differs, and takes a 91A lens.
You can think up a thousand more questions to ask, or buy the '38 - '39 Ford book from the EFV8CA and get 10 times more questions answered than you could ever dream up in a lifetime.
https://shop.efv8.org/collections/ford-books