Do you know when and where Pink and Flora died?If so, obtain copies of their death certificates, they should show the names and birth locations of their respective parents. TX Dth Idx Online shows:Flora Franks d 11-12-1969 Travis Co, TX, separated/divorced.Could this be your Flora?Pink may have died too early to be on index, it begins with 1964.
I would check out Travis Co, TX GenWeb site, some GenWeb counties are putting their cemeteries online.
SSDI shows:Booker Franks b 20 Apr 1909 (note different yr.) d Jul 1976, last residence Cuyhahoga Co, OH, SS card issued OH.
Julia Booker, b 27 Oct 1914, d 16 Mar 1998, last residence Clevland, Cuyhahoga Co, OH, SS card issued OH.