Good luck!
Just keep it easy on the carbs and try getting to eating a bit less.
Indeed, when I ran a marathon in 07, I actually gained weight (all the pasta parties after training). It's been really bad on the joints and I only made it through with pain killers, REALLY BAD.
I suggest to support the muscle build and weight loss, do it like me and go to Bikram Yoga, that is in a hot room and I tell you, it's tough, but does you good and there are many nice girls to motivate you, too :lol: