I didn't know if you were working on a coupe or vert. (mine's a vert.) So you wouldn't have the under floor braces. You can weld it together using a butt joint or overlap it. Which ever is easier for you. I prefer to try and butt weld all the joints so there is no overlap where rust can start. I only had to replace one side, but as 68Bigbird says the fit isn't perfect on the repo parts. Mine didn't match the bend the best along the tunnel and the lip along the rocker was much shorter than the original. (Don't know how you get the full pan into the car, in a coupe, without removing everything under the car. :-))