Some parts form american Nissan interchange with a RB25......small things like sensors etc are the Same on a GA16DE......when I was building my RB25/30 Twincam up I had a look at a GA16DE in a wrecked car out of intrest.....
Parts inchangeable between the GA16 and RB25DE/T
Coolant Temp sensor (for the computer)
IAC/FCID casting is the same, so is the gaksit
Fuel Pressure regulator