You know...I remember seeing a dyno sheet with a Kenne Bell blown 347, and it showed a reading of like 900+ ft lbs of torque...I leanred it was a torque spike or some such crap...I have also heard of auto's doing things on certain dyno's that don't reflect the true numbers...either over or understating them.
My advice, take the car to the track, and see how it performs...you can jimmy a car around on a dyno all day long, in the end, you just need to see how it performs.
I still say your car is plenty healthy. Those numbers are right there with GT40 headed engine combos, and you're doing just fine.
Hax