engine/wheel dyno results

ok i'm sure some one can trouble shoot my question. if some one has there engine dyno'd with a result of lets say 450 horses at the flywheel but at the rear tires it come down to maybe 330 horses. how does a person recope some of the lost horsepower from engine to rear tires?
thanks for your input
terry

Is this and auto or manual tranny and what kind of rear end is in it eg. 8 3/4 or 9 inch ford.

The other Terry