I just looked at an 08 Z06(same injectors for LS7 and LS3 correct?) and 08 LS3 vette and its injector data is slightly different. Specifically, the offset data is different. I didn't use this data before because I could not view the tunes without the beta version...I now have the beta version and can view the tune.
I'm gonna try to use the LS3/LS7 data from these files and see if that does the trick.