He can be found in the 1880, 1890 veterans, 1900, and 1910 census records under various spellings (everything but Moorehead).
If you haven't already I suggest getting his obituary and death certificate. Either may have the info you are looking for. For the latter apply directly to the PA Div. of Vital Records. For the former the Historical and Genealogical Society of Indiana County may be able to help you.