On Ancestry I found Ray Fordyce
b. 30 July 1932
d. 16 Aug 1966
Home city: Perryville, Missouri
SSN Service #: 55339841
Republic of Vietnam
Staff Sergeant
Company HHC
4th Trans. Cmd.
Province 99
Truckmaster
Coffelt Database

Ray Fordyce
age 34
Perryville, MO
Baptist
Married
Casualty Type: Hostile - Killed
Casualty Reason: Gunshot or small arms fire
Casualty Air: Ground Casualty
Body Status: Body Recovered
Length of service: 12
Data Source: Combat area casualties current file

Ray Fordyce
SSN: 496-32-9057
born: 30 Jul 1931*
d. Aug 1966
State SSN: Missouri (before 1951)

*I often see the SS Death Index record with the dob as 1 year different from every other source.

Although there is no mention of Indiana, the rest of the information fits. I hope this helps.