Uhh, what are your future intentions with the engine? No sense in making useless mods. And HP gains are going to depend heavily on the supporting mods. Camshafts are usually designed to work with headwork, valves, valvesprings, timing changes, tuning, etc. All of these things will yield different power levels, so I guess the question is: How far do you plan on going with it, and how far are you right now?