Have them take off the high-performance exhaust pipes and install some mufflers that get rid of the noise unless you plan on racing LS430 which you would still smoke with a 3.3 second 0-60 Corvette.
On the downside of the Corvette........you really would be committing a mortal sin to drive one on the salt covered roads in Chicago in the wintertime.
Quit dreaming like you are 20 years old again as a car should be like you, its owner, built for comfort, not speed.
Face it Rich, them days are over so quit drooling down memory lane and get another Lexus.