These weren't made by Airstream. They were based on a Corvair drivetrain. You can find considerable information about them at:

http://www.onu.edu/user/FS/kwildman/ultraVan.html

Another page that has great interior views of a 69 for sale is at:

http://home1.gte.net/rha/index.htm

I had another bookmark that I must have deleted. If I can dig it up, I'll pass it along

Regards,

Gary
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 jbd wrote:
 
 Does anyone know anything about the 'Ultra Van' that's pictured on the  Tin Can Tourist website?...The one pictured is a '68 model....Were these made by Airstream?...During which years?...Were there different lengths?....

 Thanks,
 JIM DUNN