I remember seeing this car at springy motors. At the time was making ~400s from memory. That must be a WR trap speed at 146mph. You must have still been running 11s I guess even with a shit 60 ft with all that power.
Good luck with build. A guy in QLD is almost done with a similar top mount single turbo setup with a 2 speed powerglide. Good times ahead for the n54.
Cheers for sharing