I'd say do 2960 calories, 444protein, 74 carbs, 98 fat. This is diet is 60% protein, 10% carbs and 30% fat, the key is to get all of the fat from good sources like natural peanut butter and hempseed oil, this should keep you testosterone levels nice and high so you may maintain and even build muscle on this diet. Also all the carbs are to be takin in Post-workout only, so something high glycemic like Gatoraide. Also increase your meal frequency, think of it this way, for every meal you eat your metabolism gets a little kick in the ass to speed up, more meals= faster metabolism. Also high protein is a must when dieting to maintain muscle mass, muscle burns calories and keeps the fat off. Don't look at the scale look at the mirror, some people are too concerned with the numbers on the scale and end up dieting off alot of hard earned muscle. Now i suggested 444g's of protein yes that is alot but you have to keep in mind how much energy (calories) your body uses up when digesting protein, so for every gram of protein ingested 30% of the calories get used up JUST in digest, neat huh. Cardio should be done 5 days a week week on an empty stomach apon waking, take your e/c/a stack before the cardio. When doing the cardio keep it to a powerwalk, this should tap into your fat stores and help you to maintain muscle. If i were you i'd continue to train similar to a powerlifter with the big 3 lifts being the mainstay in your program, these lifts are EXCELLENT for building muscle and boosting your body's hormones. Just split up your body parts more eg.
Monday: Chest/Biceps/Abs
Tuesday: Legs/Traps/Calfs
Wednesday:
Thursday: Shoulders/Triceps/Forearms
Friday: Back/Abs
Keep a log of your weights and try to progress every week. Keep the reps at 8-10 for all exercises except for Bench Press, Squats and Deadlifts which can stay at 5.