With the forward cabin cover secured to the fuel valve cover at its aft end, and held at the correct height of 15/16" at its forward end, I drilled the four forward holes in the part of the front cabin cover that will remain after trimming.
I then trimmed the aft 9-1/16 inches off of the forward cabin cover to make room for the fuel pump/filter bracket.
I devinyled, scuffed, prepped, and primed the F-7115B and C pump cover parts. These parts will be assembled, then drilled to both the front cabin cover and the pump/filter bracket to hold them in their proper relative positions before drilling the four holes that will secure the bracket to the floor stiffeners.