FWIW I prefer to give a "it'll feel like XYZ" more than specific numbers. Because at the end of the day that's what matters when you're actually driving the damn thing. 400 HP from a 360 feels completely different than 400 HP from a turbo 4-banger or even a 318 or 273. I've put together a handful of SB's and BB's usually close to stock or mild-to-moderately warmed-over. When I first joined this forum as a teenager with zero experience it was easy to fall into the trap of regurgitating magazine (nowadays YouTube/internet) builds and spewing numbers but once you build one yourself and "feel" what those numbers are they don't mean much.
The 360 in my Duster is "only" 450 crank HP extrapolated from chassis dyno numbers but that doesn't matter because it'll boil the 275-wide tires all day long through first gear and into second (with 3.55s in the rear end) and rev hard and fast to 6,000 RPM. It's enough to scare me when I stomp on the gas, that's enough for me.
That's my ramble, take it or leave it LMAO