You are suppose to make changes based off of what the car is telling you.
So if you go out and log some WOT runs, you'll want to look for things in the those runs that could be changed.
Watch fuel trims and KR and so on. Look at where they happen etc etc.
Be it that you are still on a stock pulley and just headers, not much is needed to be changed. Fueling is still going to more than enough and timing aswell. Perhaps a MAF tune can help smooth things out and help with fuel trims if you need it.
There are those few threads on here that give you basics on how to do some tuning but I wouldn't follow them to a "T".
