Look on the door for a production date. Here are the listings for a 1998.
(head only), KPH, 2.0L, w/tach, AT, thru 1/98
(head only), KPH, 2.5L, exc. SVT; AT, w/tach, thru 1/98
(head only), KPH, 2.5L, exc. SVT; MT; (tach); thru 1/98
(head only), MPH, 2.5L, SVT, thru 1/98
(head only), MPH, 2.0L, w/tach, AT, from 2/98
(head only), MPH, 2.5L, exc. SVT; from 2/98
(head only), MPH, 2.0L, w/tach, AT, thru 1/98
(head only), MPH, 2.5L, exc. SVT; thru 1/98
(head only), MPH, 2.5L, SVT, from 2/98
(head only), MPH, 2.0L, w/o tach; AT, thru 1/98
(head only), MPH, 2.0L, w/o tach; AT, from 2/98
(head only), KPH, 2.5L, SVT, from 2/98
(head only), KPH, 2.0L, w/tach, AT, from 2/98
(head only), KPH, 2.5L, exc. SVT; AT, w/tach, from 2/98
(head only), KPH, 2.5L, exc. SVT; MT; (tach); from 2/98
(head only), KPH, 2.0L, w/o tach; AT, thru 1/98
(head only), KPH, 2.5L, exc. SVT; AT, w/o tach; thru 1/98
(head only), KPH, 2.0L, w/o tach; AT, from 2/98
(head only), KPH, 2.5L, exc. SVT; AT, w/o tach; from 2/98
(head only), MPH, 2.0L, w/tach, MT
(head only), MPH, 2.0L, w/o tach; MT
(head only), KPH, 2.0L, w/tach, MT
(head only), KPH, 2.0L, w/o tach; MT