from my understanding you can use the taurus engine or the Escape engine. In fact I don't think anyone has ever used the escape engine for their 3L swap. Other more knowledgable people will be able to let you know for sure.

99 Mystique LS T-Red ATX Duratec Mods: Hella stereo Mods K & N air filter w/intake pipe www.sounddomain.com/id/jongordo8