I never realized that I wanted to convert a school bus into an RV until the opportunity presented itself. I recently got the opportunity to buy a 1989 6.2 Liter Chevy Short bus for $600. Needless to say, I jumped at the chance. It’s only got 115,000 miles on a million mile diesel engine. It was your typical short bus with all the seats, typical school bus wiring, pop-down adjustable windows, etc.