Just curious is there any codes i can overider on the pcm to give better performance?

Nope

DAMN,there just not that many options for performance for the northstar

Keep in mind that the Northstar already puts out 1HP per cubic inch. That's nothing to sneeze at. The factory already did all the tweeking for you. As Bbob say's, all the low hanging fruit has been picked.

About the only things I have heard that will help any are to open up the exhaust with larger pipes (2 1/2" I think) and then add a K & N filter. Keep in mind though, that the filter by itself will only lighten your wallet.