Where was the window switch set to bud? You usually want to keep that at (Or a hair above) the shift point and a couple hundred RPM before the limiter, just in case of an over-rev or a spin. Also if your throttle is closing the TPS would drop below WOT set point and also kill the nitrous...
And its a Maggie with nitrous.. Bump that compression up buddy you run straight race gas anyways.. high 10s, to 11:1 sounds like a good number.
Things just happen too quickly out there, good luck with the new setup bud you'll be running again before you know it
