Yes, I had that posted on my old website for years. That article was in the front of the Guldstrand Catalog circa 1989. We got Guldstrand to sponsor our High School auto shop teacher's Circle Track street stock car.
Yes, this is where things like: seats, steering wheel diameters/thickness/postion, and steering ratio come into play. None of those really have physical direct impact on vehicle dynamics. I like the way the Guldstrand article addresses the driver interaction.
I think people need to approach it in systems or groups. Sort of like just putting a 750 double pumper on a stock 1981 318 4-bbl. Or just putting a big cam in that same motor. BUT both the cam and carb together will probably net more performance that the adding the individual gains of the two parts.
Also the first 75% of performance gains are easier and cheaper that the last 25%.