I have a 1956 22 passenger school bus. It's a shorty. I had a set of the 22.5s, but for me it did not look good because the tires were so tall, 9R22.5s. So I got a set of 19.5s with 8R19.5 tires and i like the look a lot better. I am making it a hotrod for the family. We have 6 kids and wanted to be able to all go at once like you described. I had a T bucket, but that had no room for ANY kids. Anyway here are some pics of my bus with both sets of wheels for comparison.
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http://i107.photobucket.com/albums/m290/fclaridge/GreenSide18.jpg[/IMG]
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http://i107.photobucket.com/albums/m290/fclaridge/195Wheels3.jpg[/IMG]
Here is a link to my entire album of my bus project and progress:
http://s107.photobucket.com/albums/m290/fclaridge/#!cpZZ1QQtppZZ24