on a 78 coupe, I believe the half shafts are two different lenths. just not sure which side has the longer one and by how much is it longer??

 

Been awhile since I restored the rear suspension on mine, but I remember them being the same length. I tried searching a bit for you, to see what vendors listed (e.g. one part number for either side, etc.). Most vendors don't list halfshafts assembled and ready to go, just parts. The one I did find:
http://www.zcarsource.com/content/p/...___refurbished

seems to indicate they're the same length. Do yours differ in length? They might just have a slight difference in the range of motion due to the boots or other issues with the extension joints in the middle.
cheers,
Dave

 

they are the same length, i think the diff is shaped odd or offset something that would give you that perception that they would be un-equal lengths, but they are identical. infact when i re-did my suspension i distinctly remember this because when i put my control arms back up i noticed i had 2 of the same side, and panic'd, then realized that datsun saved money by just flipping it upside down and using the same part on both sides haha.



and if you do have one that longer, then your crazy.... haha.

 

Thanks guys.

 

hahahaha snw i was also in the same boat when i noticed that on my z.

 

lol right? it just looked so off flipping it upside down, i didnt notice the difference when dropping the A arms and suspension. luckily my dads Z was right next to me so i could cheat and look off his.