Ah, triangle stock. That usually comes after ther first time I break out the firewall. I have even used a piece of control rod, drill a hole in a penny, put a ninety degree bend in the end and slip the penny up to the bend and solder it. On the other side I thread the end, drill another penny and torque it down using the second penny as a sort fender washer. That holds the firewall in place and keeps the firewall from moving forward too.

That way I do not have worry about whether the epoxy will stick on the fuel soaked surface.

Cheers,

Chip