My understanding goes in largely the other direction I'm afraid. You're certainly going to have to eat an awful lot for a sustained period of time, and get your gut on your side by only eating clean food so the nutrition is actually absorbed rather the immune system attacking lots of weird artificial crap that was intended as food. To a large extent your basic structure will always be there. Am sure some of the other fitness obsessed guys on here will have some great bulking focused advice.

PS