Lower Rear Quarter Patch Repair

Those bottom flanges should be about even. It looks clamped in "high" also looks to curl upwards towards the rear.
It becomes the inner rocker at that point .He might have needed to put it in that high to meet the floor. I'm just about ready to tag out on this deal. Aint much help anyway. Really should have put the whole 1/4 in. Have the 1/4 fit and fit subsequent inner pieces to it. Tack them in, remove the fitted quarter, solid weld inner structure being careful to not distort. (gonna happen) Weld on new 1/4.