Don´t worry about the gearbox, the F20 and the original clutch will be opp for the jobb.
I´ve been using it togheter with ENEMs SC for over 100.000km without any problem (230bhp 300nm of torque).
Im also using "sport camshafts" and Lexmaul exhaust manifold. This togheter with a ported head and MBE-system.
I reckon You will be seing somewhere between 200-230hk.