1970 CUDA - 6.4L GEN III Engine SWAP - WOT Issues

I recorded a video, in which you could listen the engine failure. I hope it helps. Thank to all!
it looks as though you are hitting your rev limiter. Maybe your computer won’t allow so many times before it cuts out. Send an email to Bouchilon if you can’t call them. Does that happen when you drive it or is it only at WOT it neutral