RHS pump gas 360
The DA the day of the test was around 3300 feet, it was 100+ and ~30% humidty. Take the same engine to the coast where it was 70-75 and same humidity and it makes 420ish uncorrected. There have been many occasions where the correction factor went the other way during winter out here. Cool dry air, seen correction factors of .98-.99 so it made more at the crank than the corrected numbers.
Mags will almost always post the corrected numbers. Don't forget that the mad scientist build, which had the very aggressive MM lobe solid cam in it (239 at .050 .580ish lift with the 1.6's they used), was done on a superflow dyno which uses a more aggressive, higher correction factor for the same weather conditions than the SAE factors the DTS applies. There's a reason the westtech stuff had higher number than the same engines tested on DTS dynos. Place the DTS and superflow dyno side by side and test them. The superflow will always put out bigger numbers than the DTS because of the correction software they use. Comparisons between the two or really any dynos is pretty tough unless they apply the same factors.
I'd guess 1.5's would cost it about 10 hp max.
All good