Paul.
Have you fitted the SSL front suspension because your kingpins needed rebuilding? I've had them on my Roadster and other than the additional ride height, I wasn't too impressed, maybe it's something that the potential extra weight and power overwhelms.
What are you going to potentially replace the rears shocks with? I'll be interested to hear your comments on the improvements over the standard setup on a lighter 4/4. I have found in the past on a 4/4 just rebuilding the front kingpins on a tired setup, makes for a considerable improvement. It will be interesting to hear your thoughts once you have had a chance to try the new SSL setup out.