My newly acquired '73 240Z sounds like I'm carrying a bucket of bolts in the back seat... I'm sure the rear struts are toast and I plan to replace them (soon?). In the meantime, are there any greasing points either in the rear struts themselves or the rear suspension in general??? I greased the front end and it made a remarkable difference...

No, nothing in the rear.

No grease points , however if you are hearing undue noise check ALL the ujoints. There are four on the half shafts. Another thing while you have the car up off the ground . Rotate the rear wheels and see it you can hear any noise or feel any vibration from the axel bearings . Gary

If the original bushings are worn or have been replaced with polyurethane, they could be the cause. The poly bushings tend to squeek a lot if improperly lubed.