You need to do one constant run in 4th gear and just graph that
On the face of it things look ok but just post constant runs from 1500rpm to the redline (or as close as possible) and only that; makes it easier to read!
If you can't do it in 4th gear then 3rd will be fine
And take the torque figure with a pinch of salt; standard they are approx 250lbs ft