that torque curve is very flat, gets a plateau and hold it pretty even..
i think you could be OK to economy cruise at 1600-1700 RPM , but with a strong head wind or a Hill it would be downshift time.
at those RPMs you would not want to accelerate with too much throttle i dont think , myself i dont like the way they sound with big throttle way down in the power curve
i read of the racers swapping the diff gears from track to track , not too big a job is it ?
here is my power curves , as you can see it fall off very sharply below 2000
with my gears at 80 KPH i would be turning about 2800 .my absolute economy cruise would be lower than that .
on cruise i refer to a vacuum gauge and try to keep my manifold vacuums at such a level that the dizzy is in full vacuum advance , thats over 10 INHG manifold
as compared to yours
