I was all set to buy throttle bodies, literally a week away, then someone posted that the power delivery was almost identical to about 5000 rpm, infact the standard set up was better at some points :?
this sat niggling at the back of my mind and then alanoo posted the 2.4 inlet manifold thread.
I could be completely wrong but the power delivery of the 2.4 inlet manifold is as good as throttle bodies to the standard rev limiter (6850rpm)
If you created a high revving engine (7500rpm) then throttle bodies will be the best route, but remember the standard cams peak way below 6850rpm and even the piper peak at 6800 rpm.
So with piper cams the 2.4 inlet manifold is the best inlet system (buck for buck)