How do I replace floor pan on 70 C10?

[dtctmt]

I need to replace the floor pan on my 70 C10 and am concerned about how to do it without the cab falling. It appears that the cab is somewhat supported by the floor. I would like to do it in one piece instead of welding in a bunch of pieces but not sure if I have that option?

[PanelDeland]

There is a repop floor made.It looks like a nice piece and is well made.I haven't used one but have been told that it's the only way to go with a badly rusted floor.Most members who have done extensive work on their cab floors have removed them from the truck.If you go that route I would assume you will remove the doors for acess and you should put bracing in the door openings.
One source for full cab floors is Tim Christian.He is a site vendor and in Tn. so may be close.The full floors are quite heavy so you will want to minimize shipping if possible.
Check in the builds section for someone who has documented the full floor replacement.