Hi Hunterdude . . . I am no expert on Jummies but I am pragmatist.
If your military crank is unused NOS with ready to polish bearing surfaces and it magnaflux checks as crack free - why not just give it to a crank shop and ask them to put it on a diet and then polish and balance it?
Have you weighed the two pieces you have in hand? How much lighter does the military piece need to be?
regards,
stock49
