Easily done. The BA6 was optional on '76-79's as well. It went under the
floor between the heater boxes and the ventwork. It is actually considered a
"heater booster" rather than a heater, so I suspect that if it were getting
cold air in rather than heated heater-box air, it might not deliver enough
heat.

- Ron Salmon
  The Bus Depot, Inc.
  http://www.busdepot.com

> Has anyone tried to retrofit a BA6 from a vanagon into a 78?