True horsepower?

Most performance threads end up in a horsepower discussion.
.. there is a dyno number which means no.. fan,water pump,alternator,
fuel pump,air cleaner or exhaust and usually through open headers.
.. a net rating (with the above accessories)
.. and rear wheel horsepower which would also include with drivetrain losses.
what might these three numbers be for a 350 hp small block?

350 hp....... unless you put mothballs in the fuel tank