Is More Flow Better, Is The Smallest Intake Port That Flows The Most The Best

So you agree. "And horsepower is the mathematical end result of torque and RPM." Calculated, not measured by the dynamometer. The dyno measures torque and calculates horsepower.
Dyno measures torque and rpm, it measure by giving an engine a job, if you free rev your engine you make rpm but very little torque. A running engine alway produces power even in a free rev just not that much, a quarter mile run is max power and driving is everything in between power.

Think of it like electrical terms, you'd be watt's is a calculation and amps is all that matters and volts that probably does something but not too important.