it should be pssible in 2 years , ive heard rumors that the C6 "Blue Devil" will get a extended wheelbase to move the front wheels out further to get the 8.0 in and still have decent balance , im sure once the devolpent is done on the LWB vette it should trikle down to the xlr and a v12 , the politics involoved wont be a issue by then either as the blue devil vette will still be faster (gm trying to move vette into viper territory)