Poppa was a rolling stone

Today I am working on a timeline for #Searching4Ponysboy - the latter half of the 1970's and all of the 1980's are still unaccounted for, which just seems weird. I've used every pay search site I can think of and all the reference data seems to cover the same time period, 1991 - 2000's. I am beginning to wonder if Rick was incarcerated? At this point, I am not ruling it out as an impossibility. The trail that I can find does prove one thing, 'poppa was a rolling stone, where ever he laid his hat was his home'.