1967 Barracuda grill and trunk panel help

There's a lot of help here about restoring those grilles. Mullinax did a fine job on his.
Search should find them.
I dont know of a way to reattach that script to the rear finish panel that guarentees it wont fall off. I have very carefully removed the script and put it back in the same place again. I guess it depends on the condition of the parts atatch points you have.
I would tie a tiny single strand of wire around the posts on the backside and cover with common 2 part epoxy before I would use JB Weld. That's just me though. I dont like JB Weld. Others would use it to hold their sandwich together. :)