Took the Barracuda to the track today for first time

What static compression? .509 is a somewhat big cam if you're on the low end I would think. Is it the MP .509?

During burnout you have no load, so naturally it will rev freely. But under acceleration in higher gears the load is pretty high, so that's when it will fall on it's face if cranking compression is inadequate.

Other than that I'd say check your timing curve?