I only did a little dragracing with a hood stack, but I don't remember there being a problem.
You can either:
Pin your hood at all four corners (takes 2 people to remove),
Keep the hinges, and cut an oval hole (two things happen, engine rotates in bay under load, but mainly when hood swings open, it comes towards the exhaust),
Put a short extension on the exhaust at the hood point. Remove the extension to lift the hood.
I went with an oval opening. I put some rubber/metal trim flashing from McMaster Carr on the cut edges to avoid getting cuts when handling the hood.
The only time I ever had an issue seeing the tree was in a SuperGas car, because it had a tunnel ram and a 2' high hood scoop.