Layout on firewall
Use existing mounting holes to check alignment to the layout.
The box should be positioned close to or against the angle.
Drill four 6mm (1/4") Holes (Preferably through the fuel pump box to ensure alignment) SPECIAL Note: two important hole locations that must be verified for clearance issues are; the left-hand bottom hole that must be in line in the angle and the right-hand upper hole that must give clearance for the diagonal web and nut to be installed on the stud.
Install the Fuel Pump Box. First install one AN970 Penny washer on each stud. Then install the box to the firewall with studs through the firewall and install the nuts and washers as shown: Tighten securely.