I fixed all vacuum issues and installed my heater box and everything seems to work good.
I have new carpet in and the dash and behind dash duct work is ready to be installed. Before I proceed.....
I noticed on the attached photo of the duct schematic that there looks to be a gasket of some sort between the heater box and the cowl evaporator box. There was nothing there when I removed the heater box and is that missing seal necessary?
The box was kind of a bitch to install and the lower nut is hard to get to with headers so I would rather not remove the box again to put in a seal if not necessary.
Please advise.
Thank you.
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