The only way to really know for sure is to run the diet for a month or so and chart your body composition. At first glance I would say you are going to have a hard time losing bodyfat eating that many calories unless you are doing a ton of cardio. The fact you are 215lbs with 15 1/2 inch arms and have not been training legs tells me your bodyfat is more than likely more than 15% as well. Post a pic if you can for a better conditioning assessment.