RE: Cam gears, pulleys
 

30 to 40 hp? I dont know where youre getting that figure from, but your looking at praying for 20hp, you might be able to squeeze a little more out with a new ecu, but youre still looking at the fact that just about everythings stock in the end. All having a larger diameter exhaust and intake does for you is let the engine breath better, and set free the hp that was naturally there. And those figures would be a little higher if you put a cam with a different profile.
Then if youre running the alternator pulley you better plan to never have any form of system in your car. Honda/Denso alternators can still recharge the system even though it has an oversized pulley on it, but most after market ones cant. I found that one out the hard way.

RE: Cam gears, pulleys
 

you can get lightweight stock size Alluminum pulley kits... that will allow you to maintain stock alternator output... as far as the HP estimate I was just guessing.... I figured 30 hp with all those mods would be possible... but I could be very wrong too.... just a guess based on the individual dyno's of the components..