I have a '66 Suburban with a paint code of 0780-91640. None of the research I have done has come up with any matches, for either the code as shown or the first four digits. The one possible lead I have is that it might be a Dupont Duluxe code. The truck has been repainted somewhere in it's life, however, the firewall and interior of the gas filler door seem to be an off-white.

Thanks is advance,
~Cliff