He's hoping for 1800hp, naturally aspirated. The engine in the video was around 1300hp. ...I'm sure you know the story,more power,more power....lol.
Im assuming that its going to be a nitrous motor? 1800HP at a small 600 inch size would be around 3HP per cubic inch, usually the more inches you have the less HP per inch you wind up with. I dont think anyone has ever got 3HP per inch out of an unassisted drag race engine.