he means putting the obd2 sohc vtec head on your block....not worth the trouble at all...save your money for something else..get i/h/e then a cam or maybe nitrious or a turbo setup....

 

with nitrous, wut internals need to be upgraded other than a cam?

 

you don't need anything internally for nitrous aslong as you run a small "shot" of it 50-55hp shot...but I woudl suggest reading up mroe on it...you can't spray for to long 14-15 sec's..you have to fill the bottle...good bang for the buck but most people only use it for a short period of tiem then they move up to somthign bigger.....you will also need a better clucth like a act clucth or a exedy to hold the new power...it's kinda stupid cause you have to get your timing retarded put it on teh dyno and get guages tp make sure you not runnign lean..then you can only use it speratically..it's ok if you drag race and dont' mind having a slow car offf the bottle..there are a coupel littel things you need to run it safely like ignition to retard the timing spark plugs that are colder...