The info I pasted was from 3 years ago and my mind's a little foggy. I've been chasing down my Dad's paternal line for so long, so bear with me. :)I may have to call my mother and get some help from her.
I'll quote your questions and try to answer them the best I can!
"Let me ask a couple of questions. We need to try and narrow down a place, if possible. Where was your father born? Your uncle? Where/when were Betty Jo and Curtis married?"
My father (John Michael Dashner Sr.) was born in Galveston, TX. Betty Jo left when he was an infant and went to live with I THINK her grandmother in PA. She came back to Texas for a few months, I guess to try and reconcile things with Curtis, but then left again for PA. A year or so later she returned with my uncle, David Patterson Dashner. He was born in McLennan County, TX. This is all "sordid" past as my father had a very rough and traumatizing childhood. I know that my uncle grew up in an orphanage somewhere up north and my father went and found him when my father was 16 and brought him home. By then Curtis had remarried and had a couple of more daughters. I know that Curtis & Betty Jo were married in Texas.
"How is Great-uncle Delaney connected...her paternal grandfather's brother, yes? Where were they when you found them on (which?) census? This great uncle may be your greatest lead. How did you find out about him?"
I don't know. We have an old book with a lot of Delaney history in it, but it's at my mother's house in Atlanta and I can't remember the connection. I can't remember really anything about how we found Lewis Delaney, I'm waiting on a call back from my mother for more info.
"What was the date of death on the OKC SSI record? There's always a chance of an obituary. But frankly, I find it very hard to believe she stayed with her maiden name. Especially since she used several maiden names. I'm betting she remarried and therefore that OKC record is probably someone else. But, definitely worth a look."
Someone just emailed me her birthdate, so that is not the same person. Betty Jo's birthday is April 13 1922 for the record. Her revolving last names is why this is hard for us.
"Do you know the mother's first name or Harradine's first name? The other husband's (#2) name? When you say "She had a sister Bonnie" was this Betty Jo's sister or Betty Jo's mother's sister (Betty Jo's aunt)?"
I believe Bonnie was Betty Jo's aunt. We don't know any names. My father passed away in 1997 and my uncle passed away a few years ago, so we don't have them here to help us with names.