difference in 03 differential and 06 differential
 

Hey guys,
I picked up a new 350z without an LSD, and of course I want one. I have heard it is much easier to just swap complete pumpkins from an LSD equipped car. So I was looking and found a used LSD differential from a 2003 350z touring model. I was going to buy it and someone mentioned that there might be a difference between the early 350z's differential pumpkin and the newer models. Is anyone aware of any changes made to the differential?

Thanks,
Shaun