It looks like with the way we plan on doing it I will need to drill the spot welds down the sides and front then lift the back off the frame enough to slide it in and respot weld it.
By the way CF not sure if you know but just my 2 cents, when you over lap a panel and weld it there is a coating to put on the edges before you weld it to cover the bare metal called spot weld primer and can be welded on. Helps keep the rust out.
I use it when replacing panels on cars and is about 40 bucks a can and worth every penny.