Yes, 4.10 is a good ratio for an otherwise original 1 ton truck. At least here in the hills and mountains it is, and if using the truck as a truck at times.
4.10 gears in flat land and or if never hauling anything you'll sometimes or more often be reaching for that next gear after 4th; a clear indication you're geared to low.
In that case I expect 3.73 would be a good choice, and reasonably sure 3.54 would be to high, though I've not tried either in a stock one ton AD truck.
They could go faster with faster gears but the brakes begin to feel inadequate, and you don't quite have power to go that fast anyhow.
