Replacing panel in the cab.

[Big70]

So I have a 70 C10 And on the passenger side I think you call that a kick panel is rotting out it’s the piece of metal right below the vet under the dash where the passengers right foot would be touching. So my question is a guy at the shop are usually go to says I need and on the passenger side I think you call that a kick panel is rotting out it’s the piece of metal right below the vet under the dash where the passengers right foot would be touching. So my question is a guy at the shop I usually go to says that’s a floor pan part but I didn’t think it was I thought it was at its own type of panel. Does anybody have any experience replacing this panel end it is rotted down to where it meets the floor.... any help is good help I’m learning as I go I’m not really a good welder or fabricator but it needs to be done