winmutt...yes it is. remove the pass side kick panel, find the vac line to the center pod and plug it. use a long screw driver inserted thru the center vent to operate that flap while looking at the side of the air box from the pass side. You will see a white "button" looking thing that is the flap pivot point...study it while operating the flap with the fan on and you'll see what and where to super glue....just be sure you KNOW where the flap is when you glue because that is where that flap will stay from now on!

I also did a vacumm line mod that closes the fresh air door when the A/C is on....that helped a lot too...no longer cooling 20% outside air all the time, which is tough in 100+ days.

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Mark
1983 300TD Wagon
Even a broken watch is right twice a day