SGT FURY
Senior Member
Thanks for posting that. It’s very helpful to know before starting a project like this.
It’s not the entire firewall, it’s the hole where the air passes through the firewall. Need to remove the heater box and you will see welded in frame and a flapper door with a rubber seal. This area is different between air and non air.
Gary Goers sold the seals and listed different in the catalog, see photo.
549A or 549B
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