Stock 340 dyno tests?

You wasted 3 paragraphs to assert that You believe dyno numbers. Who's dyno? Which dyno?
You don't comprehend the difference between consistent & accurate? Dialing the mill in, knowing the torque curve, all fine. Absolute numbers?......You can take that to 5 different dynos & get 5 different "accurate" numbers....so whatever Dude...

Not my experience at all. Yours may differ, but i doubt you’ve ever spent a day on the dyno in your life.

Find a dyno with a good operator who isn’t concerned with getting a big number and if your car is right it will run what the OBSERVED numbers are IF they match the weather on the day you are testing the car.

Evidently you don’t get the difference between observed and corrected numbers.