AFAIK, the spark plug cover from an early mystique BOLTS to the valve cover. Now if using a focus plug cover, you have to drill new holes into the valve cover,,, or maybe not, maybe it was if you use a focus valve cover you have to drill new holes into the head... Or maybe it's both.

98.5 SVT 91 Escort GT (almost sold) 96 ATX Zetec (i brake to watch you swerve) FS: SVT rear sway bar WTB: Very cheap beater CEG Dragon Run - October 13-15