Gen 3 HEMI Torque upgrades?

Based on that 5.7 cam swap, it makes less torque than my current engine even at peak. No doubt the 6.1L and 6.4L can make more power but, I'm looking for power below 3000 RPMs where I normally drive at. It just seems that most signs point towards supercharge to get the low end torque I'm looking for.
There is a new SA Design book just published that might help you. It answered lots of questions I had.
"How to Build New Hemi Performance on the Dyno"
It gives horsepower and torque graphs for intakes, heads, cams, blowers, nitrous, etc.
Cartechbooks.com is where I got mine from.