hi mate good luck with the build but i think your figures arent correct. i agree with crazy, ive just done a zvh to 300bhp and its cost me over £6000, thats with management gearbox adn a proper set up by ahmed bayjoo. if your going to do it do it properly the first time in my opinion.
dont skimp on the things that matter most. if you want to power make sure the car can stop and its got a good suspension set up. and youll also want to keep track of what is going on in the engine bay and quality guages arent cheap. good luck anyway.