Has anyone measured the extended and compressed lengths of both the 240 and 280 half-shafts (left and right sides)?

There's this - https://www.facebook.com/permalink.php?story_fbid=10151884802416671&id=143989191670

 

And there's a note in Humble's Restore book about Nissan allowing more extended length in the half-shafts in May 1977, by removing some internal parts.  U-joint centerline distance increased from 13.15" to 13.54".  Nothing about compressed. 

Thanks.

I am concerned with not enough length using the 280s with an R180 diff. One side seems to be stretched to it's limit.

Perfect time to measure.  If it's 13.15, you'll know a late 77 or later half-shaft will buy you .39".