I came across 67 Impala (no Impala ID) in a shed that says SS and the 427 logos on front fender. Pulled the cover back far enough that I could see the 4spd manual and guages in the console. I took the serial number. 164879J118495 Can anyone tell me what I found. Is this the rare one? Just wondering. I've been told it's been on the concrete floor for 15 years and the owner sends rent. HELP please