From Jayski.com:

Dodge and Chevy to change models in 2007? Beginning in 2007, Dodge and Chevrolet will campaign new models in Nextel Cup competition, Yahoo! Sports has learned. Dodge will run the Avenger, while Chevrolet will run the Impala SS, according to sources with some of NASCAR's manufacturers. The change also was indicated in a technical bulletin distributed to all teams last week. Both Dodge and Chevy soon will announce that they have been given approval by NASCAR to change to the new models, with Chevy's announcement possibly coming as soon as this week. According to the sources, the stock car version has been approved for use by Dodge teams for both the current Nextel Cup car as well as the Car of Tomorrow version, starting next season. The switch from Monte Carlo to Impala could signal the end of the Monte Carlo name from the Chevrolet lineup, as its rear-drive design [NOTE: the Monte Carlo is front wheel driven - verified at the chevrolet.com site] is used on its model alone and at the present time, no replacement is on the drawing boards at GM. However, unlike its Dodge counterpart, the Impala SS will only be used by Chevrolet teams for their Car of Tomorrow, according to sources. Manufacturers and NASCAR also are continuing to move forward with plans to change all of the models used in the Busch Series, perhaps as soon as the 2010 season. That change would put smaller, sportier models into competition, like the retro-designed Ford Mustang, Chevrolet Camaro and Dodge Challenger – as well as the Toyota Solara.(Yahoo Sports)(10-24-2006)