Step 2:

First, remove the breather crossover pipe.  That's the plastic pipe that runs from the intake chamber to the air filter on the fender well.  You'll need a screw driver for removal.

Next, install the Kilby OnBoard Air bracket to the aluminum factory bracket just above the alternator.  That involves placement of 4 bolts.

Now, place the Sanden air conditioning compressor on the Kilby bracket and fasten it with 4 additional bolts. (all are provided in the kit)  Tighten all the bolts.

Okay, now remove the serpentine belt.  That requires you to loosen a bolt on the right side (facing the Jeep) idler and then just above and to the left, rotating (counter clockwise) the adjusting screw to loosen the tension on the belt.  Remove the old belt.  You might want to make a note of how the belt runs over the various pulleys, although on my Jeep there was a decal on the radiator cowling showing the correct belt pathway.  There was instructions in the Kilby kit as well.

Install the new belt provided by OnBoard Air and re-tighten the belt tensioner.  I checked the tightness on my old belt by pulling on the belt and then guess-ti-mated the tension with the new belt.  Of course, there are specifications on this sort of thing.  I've always used my judgment on belt tightness, opting for the too tight over the too loose if I have any second thoughts.  It's rarely failed me.

The Sanden air conditioning compressor that Kilby sent me had 8 grooves on the serpentine clutch.  No big deal.  The Kilby instructions tell you what to do.  My Jeep had 6 groove assemblies.  All that was required in my installation was to center the serpentine belt (which had 6 grooves) on the center of the 8 groove clutch.  No sweat.  Everything lined up perfectly.

Here's a shot of the Kilby OnBoard Air bracket (the black bracket under the compressor) and the Sanden compressor.  You might want to note the "Rotolock" fittings on the compressor intake and distribution ports. (they are the 90° aluminum fittings with the brass hose fittings attached)