Ok! i got it. i have some fuel charts, i'll gonna check if CS 707 fuel burn close to em or not. By now im getting 3300 lbs\hr per engine at FL360 at M=0.82 is that close to real values? dont have full charts now, but maybe i'll get it someday :D

Did you flew 707 at M=0.86? its pretty close to Vne at high altitude  :o

Btw, where did you get high altitude winds over the ocean data in 70s?
I read that high alt winds pretty steady, so you can get away with several ships\island stations to make winds map for fuel planning.