In a message dated 9/13/2005 7:00:58 P.M. Pacific Standard Time,
There is (was) a white nylon spacer that goes under a screw in the
window track that acts as a 'bumper' to keep the window from going
past a certain point. It was briefly discussed a few weeks ago.
These pieces fall apart after a few dozen years, leading to your
being able to crank the window too far up and/or down. It was
undetermined if new bumpers are available.
I don't know if I can cut them from Nylon, will have to find a supplier but
did make one for my car from 1/4" Plexiglas. It is laser cut and I just put
it in last week, working find so far. Can make more for $5 ea and will
include shipping in the US, overseas at cost.
I have a photo on the Datsun page of my web site.