keywords: busch nascar nextel clinch speedway
text: Busch hangs on for Nextel Cup title; Biffle wins Ford 400 HOMESTEAD, Florida (Ticker) -- Kurt Busch overcame a variety of setbacks, including a wheel falling off his car early in Sunday #39;s Ford 400, to clinch the 2004 NASCAR Nextel Cup championship at Homestead-Miami Speedway.