dynoed my 416
Nice numbers. That thing should go like a ***** on the street.
For comparison, my 340 dyno numbers were 458HP at 6000RPM and 462 ft-lbs at 4300RPM. You can't beat the torque of a stroker, and that will be a lot of fun on the street.
A bigger carb will make better numbers on the dyno, but may or may not be better in the car. I would not consider headers other than TTI or Doug's, just because of fit. If it was a drag car, that's another matter.
I predict high 11's.