US military fighters use epoxy for attaching all sorts of brackets for tubing and harness supports. I'm sure epoxy will hold metal plugs to a firewall.


"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.