This is Lee Schallers' N9857P 44-84962 stored now for many years at Schellville in the San Francisco bay area.
N9857P should be 44-84962, brought back from Indonesia by Stephen Johnson. Reportedly an former ROKAF Mustang. This plane's history with AURI, the Indonesian Air Force, is a headache. It's reported as F-312, but is most probably the second F-312, as the first one was (or was supposed to be) 44-13042, a former NEIAF Mustang maybe lost in AURI service. Also reported as a Korean War loss by the korwald database! It is also one of two candidates (so far) for the rebuilt MDAP AURI Cavalier F-364 (possible new serial 72-1538), the other candidate being 45-11447. The plane was recovered by Stephen Johnson and restored for Lee Schaller. It's now stored at Schellville. It's also case#233.