Aeromotive 18688 - PHANTOM 340 STEALTH FUEL SYSTEM - Manual (Page 5)

5. Secondly, locate and avoid areas of the top of the fuel tank that might contact the bottom of the vehicle frame rails,
supports or floor pan.
6. Now that you have identified the areas on the fuel tank to avoid, you can narrowed this down further by identifying
the orientation of the fuel pump outlet cap how you would like to route the electrical and fuel lines.
Note: Ensure that you mount the fuel pump at the deepest possible area of the fuel tank.
7. If the top of the tank is corrugated or has ribs on the desired mounting surface, the included gasket will compress
and form to the ribs up to 1/4" deep, for extreme cases where the ribs are deeper or oddly shaped the use of a fuel
resistant sealant such as, Dow Corning 730 fluorosilicone RTV, or additional fabrication may be necessary.
Do not use silicone gasket sealant as it is not fuel resistant.
8. Using the fuel pump retainer ring (C-shaped part with 10 threaded studs) as a guide determine the fuel pump
mounting location, avoiding the areas previously identified. If the top of the tank is corrugated or has ribs further
positioning will be required. Noting the location of the tank ribs position the fuel pump retainer ring such that it will be
balanced across the ribs. Note that the fuel pump retainer ring will be on the inside of the fuel tank so position it
across the ribs that protrude into the tank. Next rotate the fuel pump retainer ring such that none of the studs fall on
the side walls of the ribs. Once you have double check the selected mounting position mark the center.
BAD
Avoid having mounting hole through side wall of rib.
OK
9. With the center of the fuel pump location marked and everything double checked, use metal cutting hole saw to
create a 3-1/4" hole in the top of the tank.