I've looked at gbody parts and nos4gn, no luck.
my gasket is still in pretty nice shape, no tears. I just figured go new if still available.
I'm going through my new used airbox right now to make sure everythings tip top.
the factory used some sort of urethane weather stripping.
I have no problem using black silicone for the halves, but I'd prefer to use some weather stripping with the firewall gasket.
I was told silicone draws moisture. course I don't guess that matters if the metal is painted well.
I had some very minor surface corrosion along the top of the air box surface.
I've removed it and have the firewall in primer right now. I plan on painting it when I get home tonight
3m probably makes it. I'll check their site