This is just me thinking aloud... bear with me... 
  
I was doing a spot of wikipedia and googling... on Nissan , Engines etc... and came up with the following information but some questions remain... 
  
Q1. Our cars have an VQ35 engine, and Pathfinder gets a VQ40 - Does this mean that we could bore out our 35's to 40's? or simpler still can we transplant a Pathfinder VQ40 into a zed? (perhaps the outer size is the same... so it fall into place nicely 
  
Q2. Our Car shares engine with Murano but Murano has a CVT T/M-and 4WD Does this mean that potentially we could slap a VQ35 with CVT and perhaps get 4WD. ( Same power more grip? ) All it need is a FR diff to the front with Murano hubs and driveshafts 
  
Q3. The talks on the GT-R say that it will get a V6 3.8 ( does this mean a VQ38) with twin turbos...? again.. could this be done on a VQ35? and a VQ40?  
  
My final question and dreamy thought- Could it be possible to have a  
  
VQ40 engine from pathfinder , CVT+4WD  from Murano, with Twin turbos?  
More Power , Subaru Beater?  
  
I am thinking that in theory and with the right amount of cash, it could be a possibility ( Not for me though 280 bhp is enough thank you...  ) 
Has anyone heard of anything like this done, or remotely similar??? 
  
the though makes my incontinence pants tremble with fears of mass floodings...