Didn't mean to kick a hornet's nest!
From what I knew, GT & the "lite" engines were the same, didn't know about injector difference '03- '04.
I also believe the autos are the same - except for the autostick feature available on GT only.
If I read everything right, a GT on regular gas = turbo lite, no need to change engine controller since knock sensor will step in? ? [:I]