I have a Series2 R33 GTS-4 4door with an RB26DETT
Unfortunatly I bought the car like this, so I'm unsure about the gearbox, but I was told that a GTR item was used.
The ATESSA system from the GTS4 is still in place & functioning fine.
I have worked out that the car still has it's original 4.3:1 Rear Diff, Front Diff is GTR 4.11:1. I will be cahanging the rear diff to match the front ASAP!
Using R32 GTR Brakes front & rear
Using GTR fuel pump & ECU.
My advise is that unless you have a 4 Door, just sell your car & buy a GTR!
They look much better as well