How are we giving him attitue?! were just stating facts that just cos someone can build and engine to a set spec doesnt mean they can build a big bhp cossie engine, especially if their not yet sure how exactly THEY want it. At th eend of the day bar mapping etc ive done all my work myself, managing to melt 1 piston and bend a couple valves, but its all a learning curve. But as we have said if you dont know urself what u wanna do with it/end result theres no point in askin us to say what to put in it. You could build 5 450bhp engines all with completely differnt specs/internals and will handle/respond/drive completely different. Point being decide how you want the car, which is best to talk to a proper tuner about to get it how u want it first