Robert Lee,
http://www.40bob.com/index.html is planning to manufacture an aluminum dual overhead cam cylinder head for the popular but discontinued inline four cylinder Ford "Lima" engine. The single overhead cam Lima dates back to the 1970s and was used in many Ford-Mercury automobiles and trucks as a 2.3 and 2.5 displacement.
Perhaps an email or telephone call to Robert Lee might be beneficial?
Regards,
Gerry Dedonis
Kansas Racing Products Inc.
http://www.kansasracingproducts.com