Have used this guide to fit a Greddy Plenum to a RB25det Neo in my R32Gtst.--works a treat
All is very similar but you will need to make an adaptor place to fit the Neo AAC/cold start valve.
Also the R32 Clutch master will need to be changed over to a R33 S2 unit as the R32 Clutch cylinder sticks out too far. The R33 S2 unit has a bit more inside the car than the R32 unit hence why it seems shorter when viewed on Firewall.
Used a R33 S2 throttlebody also.
I have used the top feed injectors off the neo also & a twinfeed fuel rail so new brackets had to be fabricated-used Aluminum 3mm angle which worked a treat too. Holes are offset but everything is Rock solid with no movement.
Cheers ix9, matey you rock-this is 1 hell of a thread & 6-7yrs after the time you did it its still helping people like me
Todd