Ian, great to see the car coming along, and helps me know whats hidden under my panelling and carpets.
The rear suspension pic reminds me; with the car jacked up, and the suspension fully down, as I assume it is in your picture; Check that the driveshaft has some float. i.e slides either way into the CV joints. If there is no float, the roll pin through the inner drive hub may break as it did on mine. I had to adjust the rose joints to increase the track a little.
Dave