Reflectix [the bubble/foil sandwich] is good
Bill
I think this is a good start for the reflecting or deflecting some of the heat away from the firewall. My thought would be to use this against the firewall metal inside and go over it with the welding blanket or something equal to that.
At this point, I think this is the direction I am planning to go in, unless I see something that changes my mind.
Thanks,
Joe