Names are not correct: the Dodge brand did not sell the Viper in Europe in this era. The GTS-R was built in Europe, known as "Chrysler Viper GTS-R". Only Oreca uses the original Dodge brand (and logos) in Le Mans for marketing reason and off course the racing teams in USA. And the nickname "Maranello" for the 550 is only for the street version - the official designation was only "Ferrari 550 GTS". ("Lister Storm GT" is correct).
2. That's wrong. Even Prodrive lists it as 550 GTS Maranello