I knew from messing about with the driver's seat that there had been some repair work to the floor as one side sits up higher than the other. The front seat height was adjusted by adding washers under the seat rails... but that fix was never really going to be a good long term one.
I discovered that it is much easier to remove the floor pan coating (a combination of tar and some sort of fibre) after several warm days so I decided to search for rust and clean up the bottom of the floor pan.
As usual I found more than expected - yes folks one of these days I'll learn not to take everything to bits!
Here's a picture along the length of the car (doors off)
It doesn't look too bad eh?
But inside you can now see more of what has been going on
Here it is evident that a repair piece has been welded on top of the old floor (hence the height problem with the driver's seat) and they have butchered the cross member in the bottom of this picture by making it not as wide as it should be... Note the weld in the bottom right hand corner of the picture...