The Lingenfelter Corvette that does 9's on drag radials is the 427cu (~7litres) twin-turbo, the small block ones do 10's or worse.
And FYI, the Veilside R32 does an 8.6 1/4 on Nitto's, not to mention plenty in that class that are only a few tenths behind. And there are shitloads of private street-legal GTR's in Japan that do 9's.