Early Mk1 / Van rear shock absorber bracket

Hi everyone,
 
My van uses a wide bracket bolted to the underside of the body to mount the top of the shock absorbers; Mk1 owners are probably familiar with these as I gather it is the same arrangement. The car was quite a mess when I bought it (I've lost count of how many things I've had to fix), and this is another area that I think has been botched. Can someone please confirm whether:
(1) there is any thing separating the top of the bracket from the underside of the floor, e.g. a rubber pad or similar
(2) if so, did the bolts run through them as is, or was there a metal sleeve through the rubber pad
(3) and (just for laughs) is one mounting bolt meant to be metric and the other imperial?
 
I've seached the internet for a diagram, but can't find anything that clarifies the assembly of this part of the suspension.
 
Thanks!
 

Thanks Peter - that's a huge help.