It wouldn't be easy. Your main source of protein would be legumes. That'd be 150g of fiber a day >: S

Fats and carbs would be easy.... the only way to realistically hit that type of protein mark is with supplementation with something like Vega or Sunwarrior.... would still be difficult though. There's a lot more nutrients in meats than most people realize such as CLA, carnitine, carnosine (mainly in red meats), and lots of vitamins and minerals.

XxmetallicaxX I would say your definition of "need" would have to change.

I'm 6'1 220 and completely vegetarian. Also I'm looking to go vegan. It's not at all that difficult. Just gotta open your mind a bit