I was browsing the Holdsworth Family Forum (Genforum) and noticed your post.I sent an email, but it "bounced".
I graduated from New Brunswick High School in 1949.There was a John Holdsworth, R. D. #2 in my class.I have an NBHS 1949 yearbook.I'm not exactly sure where R. D. #2 is.My best guess is on the East Bank of the Raritan River, near Highland Park (New Brunswick is on the west bank).If you posted to the Middlesex County, NJ Forum, I'm sure someone would know.NBHS accepted students from many surrounding townships, including North Brunswick, Milltown, Franklin Park, Middlebush, etc.
Unfortunately, I think he might have died, but I could be wrong. I'm not sure if this is him.His birth date is in the year range for most NBHS 1949 Grads.
Rootsweb (SSDI): JOHN R HOLDSWORTH - b. 05 Jun 1931 d. 09 Jun 2004 (V) Last location 04605 (Ellsworth, Hancock, ME) SSN=150-26-3572 issued in New Jersey
I would guess that he probably relocated from NJ to ME after 1966.