I had no problem disconnecting my hard lines from the trombone cooler, but be sure to use 2 wrenches. The tubes can be damaged if you don't.
I had the factory lower mount, (It came with the kit) but I opted not to get it welded on. I fabricated 2 brackets that bolted to the factory mount and went to 2 existing threaded holes in the wheel well. One was the mount for the trombone cooler, the other I really don't remember. The finished mount looks sort of like a backwards "L" with the factory bracket at the junction of the 2 pieces. It came out very sturdy.
I also fabricated 2 brackets to move the horns out of the way. The way the horns are mounted from the factory, there is a small mounting bracket going from the center of the base of the horn to a fender/bumper brace. The horns are at an angle sloping down at about a 45deg angle. What I did was make 2 brackets to move them forward and up, so they are pointing down. Here is a quick diagram of the how I relocated the horns:
The left is the factory config, the right is now. The green thing is the new bracket.
I used galvonized band stock, that came from the hardware store with holes every inch or so. It came in a 3 foot strip, and is about 1.5mm thick and 1.5 inches wide. I used the factory bolts to mount the bracket to the car, and the horn to the bracket.
I didn't modify my bumper, but I did make a scoop that attaches to the bottom of the cooler. It attaches to the 2 mounting bolts from the cooler to the lower bracket, and points down at about a 45deg angle and sticks down about 1.5 inches below the valance. So far it seems to be working, and is only noticable if you are looking for it.
The hardest part of the whole thing was attaching the soft oil lines from the hard lines to the cooler. They are only about 6" long, and don't flex very much. It was a PITA to get the threads started.
I know I am kind of rambling, but I hope this helps.
Tom
[This message has been edited by emcon5 (edited 06-28-2001).]