Now for the numbers from my engine which seem to have stirred up a lot of conversation.
I am including the numbers from 2000 RPM to 5500, although I shift at 5000 due to the heavy hydraulic roller lifters and light valve springs and try to avoid any valve float.
............... HP TQ
RPM 2000 229 602
RPM 2500 288 606
RPM 3000 348 609
RPM 3500 403 605
RPM 4000 453 594
RPM 4500 499 569
RPM 5000 502 527
RPM 5500 496 474

Vic good looking car... are you worried at all that the thing doesn't make hardly any extra power over 4500? Seems like you are leaving a TON of power on the table there. The cam specs should pull pretty good to about 5800. You might want to address the weak valve springs, if you think that is causing the issue. My cam isn't much bigger and mine junk pulls to 6200 pretty hard. I doubt the torque numbers would change but you'd get more HP and more top end....