Stock 340 dyno tests?

You from NY?
Was, past tense, I have escaped the (not so) great (evil) Empire State!
If so, how close is the weather (at any time of the year) to 60 degrees, a 29.92 barometer and 0 humidity?
I can meet two out of 3! LOL. There is never a 0% humidity factor.
NY is a decent sized state, with a coast line so I’m sure somewhere you might get weather like that but I suspect in most places you don’t.
I don’t think that humidity factory is possible. I was an Islander.
Long Island.
You use the corrected numbers for that dyno on that day with that weather.

You use the observed numbers for that day and that weather if it matches the weather at the track. If you can’t get the numbers to match, there are weather stations that take the corrected numbers with the correction factor, measure the weather and the correct the power number to reflect current weather.

If you aren’t willing to do that then your Dyno experience will probably be disappointing.
When I walk into a dyno room, no matter how built it and what it is thought it can do, the results are never met except by the operators and there reasonably accurate unless they have worked with the builder before where they call the numbers.