I saw your note and wanted to reply in some detail.
From the death record that Janet found, it appears he died in SD County (code 37), not the city (code 80).The county is pretty large - the size of Connecticut.
You could obtain a death certificate from the state or the county that would probably tell about next of kin in 1983, the mortuary that worked on him, and the cemetery where he was buried.You could then contact the cemetery or mortuary for more info.You can order death certs from the state online, and you can probably get them from SD County via a fax or phone call.Or someone could visit an office and get it relatively quickly - they cost $13 to obtain a death cert that way - and it can't be used for ID purposes.
In 1983, there were two San Diego daily papers - the Union and the Tribune.They shared a lot of the same info.There were only a few free obituaries at that time printed - mainly of notable people.There were paid obituaries and death notices in the classified section but not every death was published that way. There is no index available for either paper for 1983.
There is a good chance that he resided in the South Bay (National city, Chula Vista, etc) and the Chula Vista Star-News (published twice weekly then) may have an obituary for him.If he resided in the East County (La Mesa, El Cajon, etc), there may be an obituary in the El Cajonpaper there.Likewise for the North County - there were two papers then, one in Oceanside and one in Escondido.I doubt if any of these papers have an index for that time.
I recommend getting a death certificate to see where he is buried and who the next of kin was.If you want me to follow up on this, please contact me offline.I do queries for the Chula Vista Genealogical Society.