A second hand PFC and a set of Nismo AFM's is the best bit of $1,500. A decent ECU like a G4 is only a few hundred more. It's a no brainer. You get a car that drives so much nicer and is crisper under the foot.
Rail is the same and the reg is the same. Save yourself a brain spasm and just buy some I'd 1000's or equivalent and be done with it. Get a proper ECU to boot too.
No excuse today. Put a sensor and a real/decent #not a Power FC ECU in it and have the range/ability to do whatever you want. It really isn't that expensive.
Geoff. The 8374 and the 9180, are they the same size housings with different sized wheels?
Have you got a side by side comparison? A 8374 is a bloody huge turbo, physically speaking.