Dont be shy to sign up to
Australian LS1 and Holden Forums for any tech advise on LS variants.
They love anything LS1 related and drool over LS1's in Cobras. Also you will get sorted with the best tuner in your local area...then again, I drive 90 minutes to get mine tuned so local is not always the priority?
I read you still had a MAF in your LS1? If your getting you tune 'checked' flick the maf. They are best used as sinkers for deep sea fishing on LS1's.