Interesting project! Your chassis looks marvellous!
Unfortunately I'm also oversaes and can't measure those dimensions for you. On the other hand it is a bit difficult to measure them from a car with body on. I know that few guys here have their body offs going on. Maybe they will have time to measure body mount positions for you. You seem to have dimensions for longitudinal positions already, do you need to proof those dimensions? Do you have width of the body mounts? That dimension is missing from your drawing.
Very interesting project that you have going on there! I'm using Catia V5 in my work too and I have modelled some parts for fun from vette. But nothing compared to the work that you have made!