[blucar]

Deuce lover's comment in #15 is correct about a '39 generator, however, the comment about the needing '49-50 Merc water pump mount adapters on a 59AB installation into a EFV8 is wrong.. The '49-50 Mercs adapters are only required on the 8BA/8CM engines, 49-53.
I converted the generator on my '36 from a three brush shunt, to a 39 two brush w/ regulator in '52. The '39-48 generators are basically the same except for the pulley, which has provisions for the fan blade to mount to the front of the generator with 4, 1/4" bolts.
I think it should be pretty simple to remove the outer pulley from the pulley, quite often the second pulley is bolted to the assembly.