At last I have been able to get on with the floor.
I had already replaced the OS floor panel & removed the centre tunnel. But I have been waiting to get the panels fabricated to refurbish the centre tunnel before I can do the NS.
First off, replace the NS floor panel. I couldn't do this up until now as I had removed the NSF outer wheel arch, and there wasn't much holding the shell from distorting. But I have replaced this now which stops the bulkhead moving.
Then I made a new centre section out of 1mm sheet mild steel & plug welded this in place. I have placed this under the floor panels. Reason being is the floor panels have a joggled edge that allows you to weld the floor over the top of the centre tunnel flanges. But I wanted it to look as original as possible, so I have flattened these out before welding the centre section in. Then the tunnel can go over the top and look similar to the original. An additional section was then welded in to finish the centre section where it covers the 2 bolts for the throttle pedal.
The tubes going through the tunnel needed a good clean up & a couple of new mounting brackets made.
The tunnel section was fun, I measured the position of the gear lever mounting so as to make sure I don't have any issues later. I cut the holes in the new side panel & then cut the old ones off and drilled out the spot welds on the top surface.
A good clean up to remove any surface rust from the inside of the top panel, not too worried about the top as this will get sandblasted.
I then welded the top section to the 2 sides & then placed it in the car to measure where to cut the 2 rear sections which I am using from the old panels. These were then welded onto the new side panels.
I made some new metal cable ties that are spot welded inside the side panels, these hold all the cables in place.
Positioned the tubes in place, fitted the centre tunnel to make sure it all lined up then welded it in place using plug welds. Then ground all the heads off. Unfortunately I ran out of mig wire 2 welds from the finish, so a little bit to finish off tomorrow. When the shell is ready it will go on its side to scrape off any remaining sealer etc, I can then finish the floor - there are 2 centre rail sections that need to be added. Then it wont be long before it can go to the sandblasters. Then it will look like a new shell
Im really pleased with how this turned out as the original pictures show this floor was a right mess before.
Once the floor has been sealed, painted & sound deadening pads applied, this floor will be as good as new. Shame to cover it with a carpet!