There is no way to know.. being a 340 people will say the factory lied about the power... so it could be 265hp or 750hp and spins to 8000 all day... View attachment 1716286848
You can know based on an abundance of readily available data and published dyno tests. @273 posted the holdener tests which to me prove that even a 360 smog motor can make some good power with simple mods.