1966 Valiant rear quarter patch panel question

Also a note of advice: make sure your car is fully supported and square before you cut and weld new. Mine was on the rotecesspry but I lowered it onto level jack stands to get the car even and flat before I cut and welded.
Being a unibody car the quarters hold a good portion of the weight and once cut the door openings tweek if car is not square.
Joe