I installed the Stebil horn last night. Making the mount and bolting it on was easy. Following the directions for the wiring was challenging but not too difficult (If I can do it, anyone can) But the hardest part comes with a warning.
When yo go to remove the OEM horn, its mounted on a bracket tht is bolted to the frame by a big fat bolt that looks like part of the frame construction, but I think it only holds the radiator mount. Anyway, the bolt has a nut behind it and it WILL fall and go kerthunk ting ting thud and never come out outo the floor which means its lodged somwhere behind the radiator. I was lucky, a flashlight and a BBQ sqewer and I retrieved it without removing the radiator. I was all proud that I had found it so easy, but THEN just try to put that thing back on! My hand aint fitten back there!
So I look at what I had out, a sqewer, some duct tape and the flashlight. so I bent the sqewer so there was a 90° shoulder at the end and then taped the nut to the sqewer and used the BBQ sqewer to hold the nut in place until I could get the threads started. The good news is, it must be a tight fit back there because once I started tightening the bolt the nut held itself in place.....that would have been another trick if it just spun and spun.......

But now, thankfully when you turn on the key and hit the horn, all teh dogs in the neighborhood return fire. That thing is loud!!!!!