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PeterC · 07-10-2016, 09:09 AM

[QUOTE=white64;1321486]It seems that most '40 firewalls have a plug for the big hole in the center on the firewall, is that what I'm missing? /QUOTE]
39's have that as well - I believe that was used for dealer added hot air heat supply to interior. I am not positive if correct so others will chime in and add to this.

07-10-2016, 09:09 AM	#2
PeterC Senior Member Join Date: May 2010 Location: Connecticut Posts: 855	Re: '40 firewall, what's that big hole for? [QUOTE=white64;1321486]It seems that most '40 firewalls have a plug for the big hole in the center on the firewall, is that what I'm missing? /QUOTE] 39's have that as well - I believe that was used for dealer added hot air heat supply to interior. I am not positive if correct so others will chime in and add to this.