Vertical axes don't line up.
If the torque is right, then the HP is low by 75 or so.....
Beautiful torque curve, truck must be REALLY fun to drive.
. At only 4250 pounds, I'd bet traction management is the hardest part of running that on the street. What size tire you have out back ?

 

It is a blast. I run mickey et street Rs on street. 28 x 11 17s. It will still spin from 60. Run Hoosier 28 x 10 slicks on 16" rims at track. Just converted rear brakes to run a 15 though.

 

If you go by NHRA factorung... 10.39 / 5.825 = 1.7837, 1.7837 X 1.7837 X 1.7837 = 5.675, 4250 kbs / 5.675 = roughly 750 flywheel HP. This works only if all the planets are aligned... efficient converter, dead hooks, etc.

22% drivetrain loss would be about 585 RWHP... not sure if this can accurately be applied to turbo vehicles .