The doortag will tell alot more about the specifics of it when it came from the assembly line. but that vin number you posted came with these results:
http://www.fomoco.com/index.asp?Dept...s&Tool=Decoded
model year: 1969
built at: Dearborn (Dearborn, MI)
bodystyle: SportsRoof
engine: 351 CID - 4V "Windsor" unit
consecutive unit #: 20447