First off tell your Dad he's an idiot, and that you are actually dumber strictly as a result of his advice. In fact, we are all a little bit dumber now as a result. You have plenty of blood in your body to handle any of the processes necessary. You can't starve your brain of blood.
It sounds like a lame parent's excuse to try to get you to not do something, kind of like telling your 4yr old that Toys-R-Us is closed at 4:00 in the afternoon just because you don't want to go (guilty...).
Secondly- eating prior to bedtime is a good thing. Make sure it's slow digesting protein, and not a bunch of junk food though. Metabolic Drive is a great idea, but you could eat some cottage cheese or somthing similar. There are so many benefits to this, most listed somewhere on this site, that it would take me a week to list them all.