350 watts each
2750 RPM (without gear reduction)
With enough gear reduction these should move your tank.
You really need to work out more of what you expect this to do then gives us the specs.
How fast should it move?
This and the Motor RPM will determine the gear ratio.
What is the motors torque rating?
What grade do you expect it to climb?
There is a motor calculator in the "Robot Tutorials" above.
Since the motor web page says its for use in a go cart then it should work!
Do they give you any idea on how well?