Rules changes for NASCAR Winston Cup starting at Rockingham and will be in effect until further notice at all tracks with the exception of Daytona and Talladega. The Chevy Monte Carlo and Ford Taurus will have a new rear spoiler height of 5.0″(was 6.0″ at Atlanta 97) and the front air dam ground clearance will be raised from 3.875″ to 5.0″. The Ford Thunderbird will have a rear spoiler height of 4.75″(down from 5.75″) and a front air dam clearance of 5.0″(was 3.875″). The Pontiac Grand Prix will now have a 5.375″ spoiler(down from 6.5″) and a 4.625″ front air dam ground clearance(up from 3.875″)(NASCAR Online)(2-2-98)
