Dynamometer Results & Comparisons - Question about Mustang Dyno

On a Mustang Dyno the intial setup requires the Horsepower at 50mph. I know the F body's are relatively aerodynamic so I would guess the number would be around 12-13 but I'm not positive. Our school lost our big chart that had a lot of makes and models and gave the appropriate horsepower at 50.

If anyone has any information about what it is, or where i could find it that would be awesome.

Thanks

It is 13...

thanks