My JB that I had rebuilt recently is softer than the old one, my Starlet clutch feels heavier.
Oh and after putting my big tyres on the back i'm cruising under 3000rpm The longer legs are awesome, I actually get boost in first gear now!
My mate had popped 4 ppg boxes over the years and is on his 5th stocker.
Mechanical sympathy is everything, you would drive like a grandmother compared to this bloke lol
My mate is selling this:
http://www.ebay.com.au/itm/NISSAN-SKYLINE-GTR-R32-R33-R34-PPG-DOGBOX-5-SPEED-GEARBOX-TWIN-PLATE-CLUTCH-KIT-/111323393431?pt=AU_Car_Parts_Accessories&hash=item19eb642d97&_uhb=1
Your ECU wont allow you to make more power with a highflow, it will hit R&R and make the engine hesitate.
What you are after is a standard highflow getting rid of the ceramic wheel. It wont make more power but will live as long as you will own the car.
Will also give you the option of running more boost in the future once you obtain a tune-able ECU.