My 2 cents on the install ....
Unless you are BigJ tall, it helps to use a piece of wire or rope to hold the hood down at a height comfortable for you to work.
Like WorldTour mentioned, the bolt heads holding the brackets are on the inside of the frame. At least the bottom ones are or they will interfere with the light bar. The top bolts can be either way. I also did not get lock washers, so I used nylon insert locknuts.
The smaller socket head cap screw I used loctite. The larger one holding the light bar I added a stainless locking washer.
You may need to loosen (or tighten) the frame. On mine, I found loosening the bottom frame bolt on one side just a little aided me in mounting the light bar.
I placed my wires in convoluted tubing (split tubing) and routed along the existing marker light bundle and then along the back of the firewall. Its the long way around. Soldered the connection and used heat shrink tubing.
Thats all I can think of at the moment. Good luck!
Edit - I forgot to mention the horn. The light bar will interfere with the horns if you do not bend the bracket. Pushing the bracket back for the horn that goes straight down works, but for the horn that goes off to the right, I had to remove the bracket and make a couple of bends using a vise for the horn to clear.