I think you can use the OE series Ford Adapter Part 4442. You would be better off calling or emailing Pullrite than asking about this on here. They have excellent customer service.
Pulliam Enterprises, Inc.
13790 E. Jefferson Blvd.
Mishawaka, IN 46545Phone: (574) 259-1520
Fax: (574) 258-0289
Toll Free: (800) 443-2307