Juggers, your goal is very unrealistic. First off, 8% bodyfat is very low, and requres some pretty extreme dieting and workouts, Secondly, Fat loss requires a calorie deficit, while adding muscle requires a positive calorie situation. I'm not saying it's impossible, but it will be very difficult. Even if you do get down to 8 % and maintain or even gain some muscle, your net bodyweight will still be down a few lbs. A more realistic goal would be to try to gain or maintain muscle, while dropping the fat, and even thats pretty tough for most people to do at the same time. Normal conventions are to drop first, with minimal musle loss, hopefully maintaining, then build back up.
OK, that said, there is a method that might be able to possibly fit your goals. Dr Squat (Fred Hatfield) came out some years back with the ZigZag diet, where you under feed for a period, and then go calorie positive for a period, thus the ZigZag. Here is a good breakdown on what that is.
I won't go into training, as this is the diet section, and it is covered in the article, but I agree wholeheartedly that lots of circuits, and complexes should be employed using very short rest breaks, along with some "normal" slower bodybuilding type routines.