If you are installing Hood mounts Jim and doing this by yourself, you must remove the hood struts before you loosen/remove the hood bolts. Otherwise, the hood will shift and it's a MFer to align it back up again.
I just removed my Hella Supertones a few weeks ago. They are louder than stock, but have a certain "importy" pitch that I grew to hate.
Had one of my techs do the install and I was the hood holding guy. Went pretty well, a few quick texts to Joseph @HAYNES OFFROAD and we were back in action.
The HELLA are loud as hell, but that tone may or may not grow on me. I'm not ready for on-board air and train horns yet, but if/when I do, the stock horns will go back on.