Dear Mr. Squirrel :

Whilst having the dash off and the air box open, along with the flaps and
heater core you should take a good look at the fan/motor.  PIA to get back
in there as you will learn.  There are at least two screws cleverly hidden
either side of the fan/motor which also hold the two halves of the air box
together.  If there are steel clips on your airbox take 'em off and save
them, or get new/used for re-assembly.

you may be able to remove the top half of the airbox and do your work
without removing the bottom half from the vehicle.  Can't remember for
sure.  If so your job will be much easier, I found my box-to-vehicle seals
to be in good shape, but since I pulled it that made it neccesary to replace
them.  Would have been just as good if I had not pulled that half, and the
screws to get it out are a real bugger.

Lube all moving part surfaces as you re-assemble.

--
Alan Felder
Austin TX
82 Diesel Westy
N5OSC