i have a 4 cylinder mistique and i want to drop in a v6. will it slide into the same pessision that the 4 cylinder did, or do i have to move every thing around to make it fit? and will it work with the same transmission?

it will fit its a little more entailed than just a drop in. The good thing is you can use your original tranny(cd4e auto or mtx 75 manuall). you will need the pcm and ecm for the 2.5 as the 2.0 will not support the change. Thats just the basics.

I own a Mariner and a 99 Contour SE Sport; check out contourforums.com and check out their search engine by typing 2.0 to 2.5 or something similar. There is loads of info there.

A better and more informative site http://www.fordcontour.org

probably have change the motor mounts too.