Thanks both, The picture above is not my car it is someone elses.
Mine had been bodged by the PO and the doors would not shut, so i had no dimensions to start with, which is why i thought if i had those dimensions i would get it back to where it should be.
My car is in a bit of a sorry state but will be fine once finished.
The PO had used sheet steel for sills, front out riggers and the floor, /ubbthreads/images/graemlins/mad.gif all of which is now coming out.