I am looking at building a 2008 Z06 Vette and wanted to make sure that I am reading the rules correctly. The car came with an LS7. The spec line calls out either an LS2 or 3. Just want to make sure before I build the LS3 and pull the LS7 just to find out later that it was a typo or something. I will do either just don't want to do something if it is unnecessary.