Looks like I need a 329353 driver's side spindle in case anyone has one sitting on a coffee table somewhere. I believe that this spindle was used on just about every disc brake GM car from 1970 to 1976 (as well as the Firebirds). (I am working on Gramma's car and just found out that someone at Midas Muffler forgot to tighten the lower ball joint nut 30 years ago, after replacing the original with a later 1978 part).
Here's the full story:
https://www.yenko.net/ubbthreads/ubbt...he-new-project