Trunk gap problem after new 1/4's

That's why you assemble the car with al the new panels to adjust the fit, tack the welded panels, and disassemble to finish the welding. Speaking of welding, lot's of spot and stitch. No continuous beads.
Amen Brother! Old Jerry from J&J down in Stark (he's a Mopar Man from way back) he had a super be out there in the yard for sale many many years ago over 30 years and someone hacked up a quarter like that man the warpage was Unreal I know for a fact he didn't do it he probably acquired it that way he's been in the Parts thing for a long time. I actually sold some anybody stuff years ago good guy man