Originally Posted by Mister Coaster

^ The problem with that is the fact that he will be putting on what I call "cheeseburger weight." In other words, just a layer of useless flab. Sure the scale will be going the direction he wants, but it's not the healthiest way to do it.

A rather buff guy that I used to work with a long time ago told me you have to eat A LOT, but the right things, protein mostly. Lots of lean beef and white meat chicken. If you have a very high calorie intake (3000 calories a day or more) making sure at least 40% of calories are from protein, and are working out regularly (lifting weights) you'll pack on muscle, not fat.