The big question is....
How are you going to be using your Viper? Street, track, strip, autocross, etc..?
Depending on your answer you may want to head down a particular path.
If you are looking for all naturally aspirated power, we definitely have some packages that will meet your needs. Our LETHAL 650 can put down over 570rwhp, and our LETHAL 750 can put down 650+rwhp. But the peak numbers of our packages are not nearly as impressive as our average power and torque numbers (and this is what will provide you with FAST acceleration). For example, our LETHAL 750 package generates over 700ft/lbs torque from 2500 rpms to 5600 rpms (800+ tq peak). It generates more power than a stock Viper by 3200 rpms. Best of all our packages are VERY competitively priced: our LETHAL 750 includes over $8k more in parts and still cost a few thousand less than some comparable packages.
The torque is what will accelerate you. Having this much torque on hand in the mid range will make it tough for a vette to keep up for sure.
Good luck in your quest. If you have any questions, please don't hestitate to give us a call at 408.562.1000.
Hope we can help!
-Wayne