A friend had a 588 mopar based engine in NOS trim make 940 hp and it wasn't a maxed out effort. He had the B1MC heads on it and I am sure they were not maxed out either. I don't know some of the engine details but I would think over 1000 hp wouldn't be really hard to do. Nowadays there is the Predator heads and better parts out there then when he did it. He went 8.60 at 160 in a 4000 lb car and probably about 600 hp of NOS slowly brought in. He needed less weight and bigger tires to handle a bigger NOS amount to go faster but this was around 2004 when he did this.

What does Gumpy, Bigtime, or Digby make for hp?? All though bigtime isn't using NOS.
Just wondering, also Good Luck Monty on your car.
David