1979 Bay floor dimensions help?

[Nicolasticity]

I am now setting the floor of a Viking camper - having lost the bottom 4 inches from the van the sides can move so when I set it it needs to be right.

Dimensions from data searches indicates that the width of the c post behind the cargo door is 1540mm and 1634mm across from the RHS and LHS edge of the floor behind the c post.

To get 1540mm at C post I needed to open up the panel from this

to this

ie the panel gets much flatter across its face. Does that seem right?

With the floor set like this I get 61.8 inches across the floor like this - that is to the top of the slope to the right of the tape measure which I recall is where the door would lie

Set like this gives a dimension for the overall cargo floor width to cargo door edge as shown of 1610mm.

All set now gets 70mm from the inner sill to the edge of the floor on both LHS and RHS of the van as shown in the black circle in the following;

Checking a van locally at the weekend before I tack it up but any restorers out there remember setting yours?