This has been done successfully by Chris Barone (shark toothed snake driver at Viper Days, and owner of a Viper performance and upgrade shop) and his team of Wizards. VERY expensive! and more logical to just trade in your Snake for a later model... unless you're madly in love with 400 vs 450 HP and sidepipes.
Chris can be reached at: (973) 736-0465
Chris can be reached at: (973) 736-0465