Why just make a tank? Why not expand the options of combat involvement? The flamethrowers are meant for street combat, or for controlling masses of attacking infantry. MIND the fact that I don't condone burning people, I'm just fascinated over the options.
About this creation
Model number one: The original turret augmented, a small gas container on the back and the flamethrower at the front with a tube feeding it. The tank can still perform reconnaissance missions, as it is even lighter due to the absence of the gun.
Model two: also called the Goliath, due to the giant armed turret with the gas container at the back and an arm with two flamethrower tubes on the front, for extra crispy results. The turret can only rotate as much, because the arm can't lean over the rear tanks.