I've had similar problem with a twin engine '59 Chris Craft with Paragon
gears.

I believe that a true (non turning) neutral can be achieved by adjusting the
bands, but I was never able to to keep the prop shaft from creaping while
dead in the water. I know that this creaping doesn't have much torque
because if I tighten the shaft packing (more than it should be) I could stop
the shaft, however if I rev'ed the engine up to about 1k the shaft would
start to turn.

I finally just gave up and lived with it. If swimmers were in the water, I
killed the engine.

As far as manouvering into a dock, I would leave the engine running until
I'm in postion to get the lines over and then kill it so the boat doesn't
power against your efforts.

Sorry I can't offer more encouragement.


--
My opinion and experience. FWIW

Steve
s/v Good Intentions