I've always wanted to do a school bus too, but mine would be a little different.
First off, gotta start with a "short bus". You know, as in, "What do you ride, the short bus or something??"
Then chop the top so the windows have that low slitty hot rod look. All the glass is flat, so the new window sixes shouldn't be too hard.
Tweed upholstered interior, big meats on the rear, flames down the side, and a nice big blower sticking through the hood.
It would be called the "S' Cool Bus". Since we homeschool, it would have particular significance. 
My first Challenger was built by homeschooled students. Just wish we could have had this tow vehicle! 
