Turbos do make more efficient power but often the combinations are more difficult to tune properly for good driveability. It takes the fun out of owning a 600+ HP vehicle.
On the other hand a Supercharger makes very good power and instant TQ which is what you want for a 6,000+lb truck.
We have two very proven combinations with our Roush 650HP and Whipple 650HP kit. Both kits are very well put together and make about the same amount of power that your stock engine can handle. The Whipple is a larger unit and allows for further upgrade-ablility to make more power if a proper fuel system and built engine are installed.
If you have any questions feel free to contact our team at 732-780-0770.
JimIII@JDM
Whats the size of the roush? whipple a 2.9L, Roush?