good luck,
just remember you need to use the rb25 ACC value, as it has 2 plugs on it and the gtr one only has 1.
you also need to mod the throttle cable, use gtr fuel rail + injectors, wire in a gtr resistance pack and get gtr injector plugs.
Also you need to mod the water outlet on the gtr plenum as it hits the VVT; best way to do this it remove the water outlet on the rb25 plenum (just cut it off) and weld it onto the gtr plenum.
i've put a gtr plenum on my 25 (non-neo) using the blitz kit plus changing afew things along the way to fit better