This has been a great forum discussion and given me allot more insight into the entire issue of alignment than I had.
6997 has yet to get to an alignment shop after the suspension rebuild, but following this discussion I have spent the day relooking at caster, camber and toe in settings.
I really tried to get the suggested settings using a simple two sting parallel line set up and an accurate 1m long level and lots and lots of measuring .
On one side I ran out of front caster adjustment, on the other side camber, so had to settle for the maximum possible in each instance and set the other side to match the measurement. I then set the toe in alignment using the two external sting lines.
It is surprising - I do think you can get the settings close on the garage floor with enough care.
I will have this car into a professional alignment shop shortly and will admit to the forum how far it was out when they put it on the computer!
Thanks again for all the knowledge poured out into this discussion.