I installed a B&M 70264 about a month ago. It's the bigger of the two choices from B&M that most use for this mod.
It's twice as thick, but the face of it is more narrow. This one is rated at 14,400 BTU versus the 13,000 BTU of the smaller version, B&M 70268.
I had to remove the horn on that side to get it to fit, but I was planning on tossing the factory horns and relocating the mounts for an upcoming mod anyway. If you want to keep the horn there, there was another thread where someone mentioned they just bent the bracket forward to get it to clear successfully.
I used the same. Used the brackets that come in the kit instead of the zip ties through the AC condenser.