Now that I have your attention, I am wondering if I would be dreaming if I were to hope for ~600 FWHP from a 408 with L92 heads, LS3 intake, Custom cam, and springs. It's a Callies Compstar Crank and rods with Diamond Flat top pistons. Not sure what compression ratio I'm goin with yet, but the cam is goin to be a custom grind for under the curve torque. I am really hoping to have 500+ RWHP thru a T56 in a RCSS. Thinking of possibly either a rear mount turbo or a fairly large shot of nitrous, either way this will be decided before the motor is finished and built accordingly. Let me know what you guys think, and if it doesn't seem to be enough for my goal, let me know what else you may do. Thanks