70 dart 470 ci drag car build.
peak power on this run was at 672.15 @ 5700 rpm.
We ran the **** out to 7100 rpm just for fun & @ 6800 it made 622.99.
So I had a grand total of 49.16 horsepower loss.
From 5700-6800
But I have 4.10 gears on the way so I'll be crossing around 6300 .
Brake specific fuel consumption also.