Having found within this site some info on reading motor codes, I've concluded that my intake manifold is a 1970 from either a Fairlane or Torino. The previous one owner of my motor says it's the one that came on the 460 Panther marine motor new in 1977. Why would they use a seven year old manifold design in building a motor for a high dollar boat (in 1977). Where they special in some way?