Need some advice . I'm replacing the trunk floor and the lower roll pan. It was completely rusted out and the previous owner cut a huge hole to mount a mustang gas tank in the trunk. I have the main part of the new floor welded in and was starting on the lower roll pan. The trunk lid gaps are way off. The roll pan area is good, but above the tail lights and below have closed up. I have attached tie down straps to each tail light and to my lift and can get the correct gaps, but the is no way that when I weld in the roll pan that it will stay. The only that I see to solve this problem is to cut the gutter and weld. It looks like the only thing that holds the correct gap. Am I heading in the right direction?