I am in the process of replacing the floor pan on the passenger side of my 53' AD. I ordered and recieved the pan from Jim Carter's. My question is, the replacement pan is long enough to go about 2 inches underneath the seat base. The seat base appears to be welded to the floor as there are no bolts that attach it to the body. What is the best way to tackle this? Do I need to remove the seat base to do this correctly? Any help would be appreciated.