Ej207 bottom end motor - $2700 odd
6mt gearbox - $4k
Turbo -$1k
Ecu - range from 1.5k to 5k supplied and tuned

Budget close to 12k if you're going with a gc8 that's fairly stockish to chase the qtr time target you have

Go to the performance thread to get ideas of what others have done to achieve what you're chasing
Do it once, do it right
No point trying to reinvent unless you've got time and $ or want to be a pioneer, like Tino!

http://www.perth-wrx.com/vb/general-...ce-thread.html