SSL changed the coilovers and ARB & bushing to the same sort of recipie that Spax had on the development & pre-production cars, & RaceDyn's recommendations after analysis. All three - SSL, Spax and RaceDyn are in the same ballpark, apparently. It's also said to be pretty much the pre-production spring/damper/ARB setup, which Morgan inexplicably changed for production.
The SSL compliant drop links will be the main difference from your setup at the rear.