To add to the mix - I lifted my 100 with Koni shocks and King Springs - Fantastic - I sold it 80,000ks later and no difference - the installation was great and they kept all the measurements to retune it anytime I needed - They took into acount the load pattern of the vehicle and spaced the left rear due to rear mounted tyre. Might be worth asking the question during the installation of your Ironman.
Cheers Dobster
Cheers Dobster