I compete in the 181 class and have bigger lifts than you and am sub 10% bodyfat year round. I still get in around 3500-4k calories in my 6 hour window and have pushed it up to as much as 6k if I need to. Read up about intermittent fasting. Obviously you eat too much.
I've gone the 6 meals a day route before and the 5-6k calories a day when I was bigger and still found it easy enough to prepare my meals and keep it clean. You either do what you need to do, or you don't. It's as simple as that.