My choice would be Kraftwerks c38-81 rotrex kit especially since right now they have an awesome deal until the end of month - you could get the kit with black or aluminum blower for $3800 shipped in US. but since you're in europe the shipping I guess would be extra. You could get it from a vendor too, maybe they'd cut you a deal on shipping. I am very happy dealing with @
fteightysix, thanks to utekineir who recommended these guys. On c38 it looks like you should be able to get 300whp on regular pulley and you still have an option to go with smaller pulley. Check threads on kraftwerk's kit. You would need pump and injectors I thinks. The tranny will be ok. if I were you I probably would not spend money on exhaust and header until after the kit is installed unless you want the sound as performance wise they don't bring a whole lot for the $ spent. Again check the kraftwerks thread for dynos.