With the 2.3 Whipple and a built bottom end (as you state), you can reach 600 rwhp easily. With a 3.4 (i know of 3 people who ran this set up on a 3V), you can easily attain over 700 rwhp.
Just depends on how hard you want to push the car. I have 604 rwhp at 18psi, but on race gas as I view good gas as cheap insurance for the motor.
Here is my car running at the track just last Friday:
http://videos.streetfire.net/video/7...ger_689078.htm
my best mph is 134 mph, so when I get the 60' sorted out it will easliy run a 10.2X.