Dirty bulking is never good IMO plenty of ways to get calories high with out eating crap, plus IMO people eat way to many cals than they actually need, you do not need to be gaining excessive amounts of fat in order to gain muscle that is ridiculous, and the bit of extra muscle you may gain from all those extra calories proberly will be lost due how much you will have to cut... I've been there, and now there is no way ill "bulk" again,