Talk to Bill Jenkins, his email is in the parts sources list on the main page. That or I would suggest buying a used motor from someone because you'll probably end up about the same cost in the end with a lot less work.
Rick
The first Blown 3 Liter! "Drive it till the wheels fall off" -my personal motto!!!! 98.5 T-Red SVT #6180 Many Mods Buckshot77@aol.com Owner of 00 #1611 Silver Totalled on 10/7/01 SVT Parts for Sale