OK guys. I spent all last night and today looking at brake calipers.
I ending up going for the new, NOT rebuild, new AC Delco 'O Ring' design cast iron calipers from ecklers. With all the stainless steel brake lines, pads, pins etc, etc, and our club discount, cost $665.90 U.S. for all four wheels plus freight. [about $888 aussie dollars].
To go the aluminium force 10 from Stainless Steel Brakes Corporation worked out to $1500 U.S. and I just had to draw the line some where. Bugger.
Thanks for all your input's. Much appreciated.