Yes
Hi Wavy, YES almost all American 1pc cranks can be interchanged. In addition, you can use orig crank, and just change the sprocket, and put in back together.
Worksman front brake wheel, trouble here Amigo. Your fork is set up for 5/16 axles (I think) and Worksman uses 3/8 (nominal) I know. I do have Grube front brake (not as good by a long shot, but still a drum). I've got Sturmey Archer drum wheels available too, tho they appear to be 8mm fine ( a bit under 3/8). What size is the slot or hole in your fork (I've never had a bee-hive, but many of the others) One concept is to grind flat sides on the axle, and slide it in that way, some axles are even made this way already.
Drums work fine on Springers, I just need close-ups of what you have to be able to help more accureately.
Mike