The only vintage school bus that I know is currently being restored is a 1950 Ford bus. A good friend of mine who is a fabricator is building a full custom frame, airbag suspension, newer aluminum truck wheels, and a chop top. I dont know of any Chevy's being restored, but theres a scrapyard near my house that has about 30 old busses in it ranging from the late 30's to the early 60's. Most of those are Chevy and GMC.