There is a Marvin Dixon in the 1940 Indiana census, born abt 1936. His parents are Paul & Estella. Not sure if Orange Co. fits the bill.
Year: 1940; Census Place: Paoli, Orange, Indiana; Roll: T627_1083; Page: 15A; Enumeration District: 59-13
Ancestry.com. 1940 United States Federal Census [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc., 2012.