Maybe an other head producer in the game.

Newbomb Turk said
No offense to you or your brother, that’s not impressive for a blower car. Not in my book anyway.

I can take about any 500 hp 408 with TF heads and put a blower on it and do that.

Again, I’m not pooping in your cornflakes, just pointing out what I see.

It's naturally aspirated. Challenger 1320 dosen't have a blower. And 636 hp out of a stock 392 naturally aspirated is pretty impressive in my opinion. I think that you may have it mixed up with a Hellcat or something.