Looking at a very rusty 2 door 1960 saloon. I am trying to work out exactly how to fit the various sill parts. It needs a new box section and the under sill, plus kick plate and finisher. The inner sill inside the car seems fine. The floor should get away with a small patch.
Working from this diagram:

It is the floor edge panel that puzzles me. How far should it jut out past the box section bottom? My sills and floor are so far gone there that any measurement is lost. And how does it just fit to the floor?
Thanks for any help!!