I'm just curious if your hostility was aimed at me, or if you really prefer to avoid information when making decisions.
No hostility aimed at all. Wasn't meant to insult anyone.
I just feel like real world experimentation trumps equations on paper.
While a controlled environment like the track will produce closer results to what engineering suggests, a car driven on the street will likely operate much differently, pavement, tires, air temp, suspension type throw some serious wrenches in theory. Most of all driving, guys with a heavy foot will just blow the tires off at every stoplight with 4.10's.
Some guys that goto the track and are serious have multiple rears or 9 inch center sections that can be changed quickly. If the math was right every time that wouldn't be necessary.
My point wasn't that you were wrong or right (because I have no clue either way), it was more to the point of pick a gear ratio run it and see if it's what works best, if not gears are $150, try another set.