Floor Pan Replacement - where to cut?

I cut out all the floor to fit the new pan,reason I did this is because I wanted the most new metal in the car.That being said the pan I bought from rockauto was a full front side(I installed both front pans seperately) the pan you picutred doesn't have the lips on the side and top area so IMO you should leave the pinch welds and trim the floor 1/2" below it then place your pan in the car and outline the pan with a marker(fine tip)Also cut the end of the pan to match the floor cut..When you cut the floor cut it about 1/8" on the inside of the line then go back and trim it as needed.I personally wouldn't overlap the floors,too bothersom sealing the top and bottom.You will still need to stitch weld around till its complete.