its the head that makes ess_threes power. i bet thats a good £750 head. and you wont find a schrick inlet cam on its own. newman or cat maybe?
seriously id get the head done, a map, a decent exhaust and a bloody good service with all new sensors. go to steralth and il bet youll get 190hp. but thats a pub figure. what we should be chasing, is torque.
infact, the best thing for these abf's, is a lightened flywheel.
can i ask what suspension setup your using? how quick a car is isnt always about the engine