Body Fat Composition: My Personal Challenge

Last week I had the opportunity to have my fat body percentage taken and it came out to roughly 13% at my current weight of 155lbs.  I was pretty satisfied with it initially, but then I thought to myself, what if I can drop that down to 7% while maintaining the same weight.  Would that improve my performance? 

Current
Present Body Weight: 156.4
Present Lean Body Mass: 134.82
Present Fat Mass: 21.58

Desired
Desired Body Weight: 155
Desired Lean Body Mass: 142.60
Desired Fat Mass: 12.4

So, basically I just need to lose 9 lbs of fat and gain 8 pounds of mucle to accomplish my goal.  In theory this should improve my overall race times and not be detrimental to performance(assuming race specific training is maintained).  I will have enough fat to use as energy in longer distance races (most professionals have body fat between 3-6%) and use the added muscle as a resource.  The key here is to gain that muscle in muscle groups that are utilized in the specific sport (hamstrings, quads, hips, core, lats, and shoulders).

Now, the hard part - accomplishing this goal.  It's really pretty simple on paper, but more difficult to do in reality.  Add in a consistent weight training program(3X a week), maintain endurance training,  add in enough time between weight training and endurance training so the effects of one don't hinder the other, add in more protein to my diet, and limit the 'bad carbs' to a minimum.  I'll report back my findings after the goal is accomplished and next race is complete in early August.