DETROIT, Mich (WLMI)  Chrysler Group is reporting a first quarter profit of $473 million.  The figure represents the company's best quarterly performance since 1998.  The automaker says revenue for the first three months of the year was up by 25% compared to last year and their global sales were 33-percent higher.  Sales of the Dodge Ram pickups, Jeep Grand Cherokee, and midsize vehicles are credited for the continued growth.