Well it appears you have no sync at all. 60 to 66hz shouldnt be that much of a difference for the oscillator to lock onto that.

However, its the horiz frequency that might be different enough, and in which case you can find the horiz freq control and adjust it for that frequency your sending it, as long as your not too far off. Then a voltage mod might be required, or maybe swap a couple parts in the horiz osc to change the center freq.