The website Dirty Hero has dug up a fantastic old treasure trove of hand-drawn custom van styling tips that originally appeared in a 1976 edition of Hot Rod Magazine Vans. They have the full text too, and it's a reminder that vans need to make a comeback.
You should go over there and read the whole thing, but I'll throw some of the sketches up here as well because they're so great. Someone remind me why we don't still love vans?