Tank Girl's movie tank was a heavily-modified,
late-production Stuart M5A1 tank.
Late-production M5A1's featured a vent port between
the front two driver's hatches, a smooth right side
turret and sometimes a rectangular rear stowage box
(which the Tank Girl tank had).
The tank stolen from Water & Power is not the tank used
for the modifications. A Soviet (PT 76) was the tank in the
scene with the theme from "Shaft."
Interior shots were not done inside either the original stolen
Water & Power tank nor the modified tank.