There
are two types of window lift mechanisms used on the
68-70. They differ by the method used to attach the
window handle. Up to late 69 model year production the
handle was held on by a screw in the center of the
handle. Late 69 production and all 70 cars used a clip on
handle. These two handles are pictured on the
HANDLES
section page. Since 30+ years have passed, it's common to
see the cars "rearranged", so check what you have.
It
would be better for parts availability if Nissan had just
continued tapping all the regulators for the screw after
late 69 but they didn't. To use a non-tapped regulator on
an earlier car you'd have to have the handle mount
portion drilled and tapped. To use a tapped regulator
with the later clip on handles you'd have to cut a groove
for the clip to engage in the peg that protrudes for the
handle to mount on. You can of course use the "wrong"
handle for your car. Some of the parts are cheaper then
the other version, and people sometimes modify things to
go that route.