help with car quarter panel trunk gap.

[blazer2007]

I hope someone can help on my botched quarter on a 67 belverdere,not getting any help on the mopar forum.I replaced the taillight section and the gap on the trunk was good but after finishing the stich welds the gap is too close now.Any ideas on how I should try and move it over abit, a relieve cut somewhere and push it over some how or cut the spot welds on the bottom of taillight section and pull it over? other side of trunk is OK and there is no more room for adjustment