If you look at the emblems on the fenders you can tell 64 will be a Bowtie with the series under it, 65 will be a rectangle with a Bowtie and series to the right and it will be on the cowl panel instead of the fender, 66 will be a rectangle with a Bowtie on top and the series number below. The enigne is more than likely the 283, Transmission might be a three speed that was converted to a floor shift or could be the SM420 4speed the way to tell there is look at shape a 4speed will be real square shaped and the three speed will be shaped long and slender like an automatic.
