Play in HEI shaft?

[lukecp]

I installed a Crane adjsutable vaccum advance and re-curved my HEI with the blue and silver springs in the vaccum advance kit. While i was putting on the springs, i noticed that the little platform that the mechanical advance weights are mounted on would move up and down about 1/16-1/8 of an inch, if i rotated it counterclockwise. Is this normal or is my HEI worn out? After i got the timing dialed in (blue and silver springs, 11 degrees of base timing, and the vaccum advance turned 4 turns counter-clockwise), the truck runs great without any spark knock. I do have a spare HEI i can throw in it if mine is worn.

Thanks for any help