It sounds as if your family did not know Boyd Lundy very well.Have you tried ordering his death certificate or Social Security Application?Both should list the names of his parents.He filled out his SSN Application himself, and the death certificate should be as accurate as the knowledge of his informant (likely a family member).
Here is his SSN entry: RAYMOND LUNDY, born 3 Jul 1901, died Apr 1979n Dallas, Dallas, TX. SSN 449-09-9868(issued Texas)
In the 1930 census, Alma is living with the 2 boys and without her husband, but she is still listed as married.
I checked the Texas State Marriage Index (1966-1999), and found an entry that looks like your Raymond: Raymond Boyd Lundy, age 64, married Gertrude Screws, age 65, on 31 Mar 1966 in Dallas county, TX.State File # 016099
It looks like they divorced soon after (per Texas Divorce Index): Raymond B Lundy, age 71, and Gertrude, age 72, were married on 31 Mar 1966 and divorced 25 Jun 1973 in Dallas County.State File #025579
I see a second divorce that looks like him.This marriage is not listed in the Texas Marriage Index. Raymond B Lundy, age 76, divorced Virginia R., age 78.married 4 Dec 1973.Divorced 9 Jan 1978 in Dallas county.State File # 001150
The Texas Birth Index gives the names of the parents of children from 1926-1950.There were 3 children born to a Ray Lundy in that time period (this is not necessariy your Ray Lundy):
Miriam Alice Lundy and Elizabeth Ann Lundy (twins), both b 2 Feb 1940 in Dallas County to Ray Lundy and Inez Roberts Ray Roberts Lundy, b 24 Aug 1944 in Williamson County to Ray Lundy and Inez Roberts