Is he F. E. Martin?
A letter to Paul Kunsyz - http://www.1967shelbyconvertible.com/research/other-cars/67ST102/1966-09-30%20Letter%20to%20Paul%20Kunysz%20from%20Frank%20Martin.PDF
More content to the letter - http://www.1967shelbyconvertible.com/research/shelby-1967-company-cars-list.asp
A letter to Paul Kunsyz - http://www.1967shelbyconvertible.com/research/other-cars/67ST102/1966-09-30%20Letter%20to%20Paul%20Kunysz%20from%20Frank%20Martin.PDF
More content to the letter - http://www.1967shelbyconvertible.com/research/shelby-1967-company-cars-list.asp