For some one like myself I would have been better off buying a GTS N/A RB25DE R32.
As my diff, gearbox and brakes will soon to be replaced with stronger and bigger items.
My motor has been replaced.
For some one who is looking at slotting an RB25 in to an R32 going a R32 GTS RB25 N/A isn't really a silly idea.
Grab the RB25DET front cut, drop the motor and gearbox in, slap the R33 GTST (same size as R32 GTR) front brakes on, buy R32 GTST rear brakes (I'm assuming all the N/A's run crappy brakes).
Grab your self a 1.5way diff or R33 GTST Diff (4.11:1).
Wiring mods have to be anyway so while you are there integrate the knock sensors in to the N/A loom.
I havn't looked in to the N/A's much so I don't know if they come as a M-Spec with the bigger brakes etc.
It all depends what you want out of the car and your plans for it.
The wiring part is easy, especially if you have wiring diagrams as I do.
In SA the Rb25DET in to the R32 is a fairly common swap, the only requirement is that it runs everything stock and runs the R33 brakes.
The other bonus of the RB25DE N/A is that you will sell just the head for more than you could sell the RB20DET long motor.