Transmission you need to make your Yard Dart an AWD

http://en.wikipedia.org/wiki/List_of_Ford_transmissions
The ones you want are the MTX75 or CD4E for the Zetec and 6F35 for Duratec. I believe there was an AWD F4EAT before these that was mated to a Zetec. Most of these can be found in the Ford Escape. We are currently watching www.Copart.com for a nicely rear-ended example to purchase though "Shaman" thinks he might have located an '06 a little closer to home. As soon as we get our hands on one, we'll do a full "how-to" with pix of the drive-train swap into an Escort with a Zetec.