Why would 4.10s be "great"? You can get 3.73s already which is close enough.
4.56s would be the next logical step to help our platform, regardless of engine/trans combo. If there's a possibility of another gear option for our platform, 4.10s would be a waste. (4.10s with 32s is weaker than a stock vehicle with 3.73s. The final drive ratio is the same, but that doesnt account for inertial forces. And anyone with 3.73s already has a 4.7 or 5.7L so they're not going to waste the money to regear for a negligible difference. )