Gregg from memory you have a stock tune. As has been said, when the ECU goes into learning mode after being reset (either by loss of power or manually), you need to start it and let it idle for about 10 mins, then drive it and FANG THE CRAP OUT OF IT for about 10 mins. It then learns a nice power delivery map
This always worked for me in my SS LS1 years ago.
Failing this, I also recommend Eroll at EFI Dynamics.
Failing that, there's plenty of sponsors over at
Australian LS1 and Holden Forums - take your pic on a shop, or post on that forum and you will get much LS1 help.
Cheers
Ben