i'm no expert on dynos, not by a long shot.
but that sounds way off to me, i'm under the impression that crank dynos will always show higher numbers than a chassis dyno because you lose power through the drivetrain and the weight of wheels and tyres etc.
also on the final gear ratio, i think it refers to the ratio of SPEED not power but i could be wrong.
someone with more detailed and accurate info will chime in soon