I can't really claim credit for this one, since my daughter bought it.   When my wife and I tally up the "no, she's more like you" attributes, the affinity for unusual vehicles gets tallied in my column.   It is built on the Chevrolet P30 step van chassis.  This particular one has a diesel engine; both gas and diesel engines were available.   I don't think that the blue flames were a factory option....

It does make an awesome expedition vehicle for group (friends and family) tours of the west and southwest US.

This model is based on the GM P30 step van chassis.

Additional Bluebird Mini-Bird images from Google Image Search

A bit more Blue Bird Mini Bird info from Wikipedia.