if you specified that you have a 98 contour GL with a v6, the autopart store should have sold you pre-gapped spark plugs made for your car only (bosch platinum plus gapped and threaded for the contour). Its always a good idea to check, but i'm pretty sure they come pre gapped.
edit: my old stock motorcraft are at 0.051 inches
gaps are the same for SVT and contour gl, so according to this site,
http://woodfam.com/ryan/svt/essential_info.html it's
http://www.stuff.to/svtspecs.php