97 rough idle when in gear

I replaced the head,head gasket plugs wires egr valve. Still when i put it into gear,it wants to stall and does most of the time. What else can it be

Is it only when its in drive? What about in neutral?

when it it is drive or reverse, neutral is ok.

After searching the contour/msytique forums (www.contour.org) the concensus with people with this problem seems to be a bad trans mount. Take a look and see if your trans is resting on the subframe.

http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=tranny&Number=1247599&Forum=All_Forums&Words=1955&Match=Username&Searchpage=0&Limit=25&Old=allposts&Main=1247599&Search=true#Post1247599

Which motor?

Does it idle fine till it warms up? or just stall as soon as you shift it , reguardless of engine temperature?

There's also the possibility that it's your engine wiring harness as Ford had a recall for this. The wires had a history of cracking and therefore shorting. This can cause stalling because the wiring harness connects to all the sensors and regulates ignition.