For 707-320B and -320C aircraft substitute the following [fuel] section:
[fuel]
Center1 = 10, 0, -0.1, 7741, 0 //Ctr Wing
Center2 = 0, -19.250, 0, 3985, 0 //#2 Main
Center3 = 0, 19.250, 0, 3985, 0 //#3 Main
LeftMain = -12, -57.575, 0, 434, 0 //#1 Reserve
RightMain = -12, 57.575, 0, 434, 0 //#4 Reserve
LeftAux = -10, -40.600, 0, 2350, 0 //#1 Main
RightAux = -10, 40.600, 0, 2350, 0 //#4 Main
fuel_type = 2
number_of_tank_selectors = 1
electric_pump=0
For 707-120B aircraft use the following
[fuel]
Center1 = 10, 0, -0.1, 7306, 0 //Ctr Wing
Center2 = 0, -19.250, 0, 2275, 0 //#2 Main
Center3 = 0, 19.250, 0, 2275, 0 //#3 Main
LeftMain = -12, -57.575, 0, 434, 0 //#1 Reserve
RightMain = -12, 57.575, 0, 434, 0 //#4 Reserve
LeftAux = -10, -40.600, 0, 2062, 0 //#1 Main
RightAux = -10, 40.600, 0, 2062, 0 //#4 Main
fuel_type = 2
number_of_tank_selectors = 1
electric_pump=0
Happy Flying!