I just did a "what if" in Tamiya colors for the topsides and MM 4766 (acrylic) for the bottom...the Tamiya seems a little dark from my memories of working Phantoms back then. The MM acrylic looks good to me.
Also in the Squadron Christmas flyer I noticed that Vallejo has come out with a Vietnam war scheme SEA set in the Model Air Line. Hopefully thay are going to be a good match. Going to order out a set to try out.