I started with 380 and now I have 402 at the rear wheels;dyno number (480-500 flywheel)
Just about right.
I have driven several big block Cobra with 600 -630 flywheel (dyno numbers)
Just about right
I would say 500 to 650 is a good hp range for a street Cobra. They come with a gas pedal not an on off switch.
Dwight