thanks all,
I think I'll probably go with the TKO 600 but I'll take alook at Richmond before I part with the hard earned.
The comments about the diameter of the T56 Magnum are what make me think it wouldn't fit the tunnel in the CCX I don't think the frame is an issue.
I have a 3.31 rear end so I'll do some calcs on the best 5th ratio for me.