Ha good for you. You'll love it. They are fun to drive and ride in. My dad has an old scenicuiser that is huge. It is much more aerodynamic than the MCI and modern buses. The front part is low to the ground and then about 10-15 feet back where the storage bays are it goes up a level. It has a kitchen (gas stove, sink, microwave), bathroom with shower, a table with booths, and 4 beds. It's a piece of junk and stuff is always breaking down but he likes to work on it (which is why it is always breaking) amd fun. He put a big diesel with a turbo in it. I can't remember which model but I do remember that it is 8 cylinders. It is pretty fast for a bus. Ok so I was looking over the factory engines and I am almost positve it is an 8V-91 which I assume is 910 cubic inches. That with a big turbo and larger injectors puts out some power. How much I don't know but you definitely feel it.

http://busexplorer.com/PHP/MidPage.php?id=177
http://greyhoundbusmuseum.org/gfx/1956Scenicrusier.jpg