Mopars 1968 '383 Engines'

my car was 8/27/67..but its orig pie tin was gone... i have never seen an early survivor 383-s or GTS to see when the pie tin cut off date could be! i bet it was with in a few weeks [so mid august latest]... got any pics of early SPD survivors?

Dan

No 68 Darts or Barracuda 383 blocks are stamped HP correct?

Dave