Be careful when relieving the T&D rockers if you are running a lot of spring pressure (700+ lbs). My previous set were used with the 1.65" spring and required relieving which reduced their life to about 200 runs. They were breaking like clockwork at that point. Called T&D and they said DO NOT RELIEVE the rockers or they will fail. I went to a 1.55 spring and the rockers did not require relieving. Also, T&D does not like the use of offset keepers to gain installed height. It puts the retainor too close to the rocker.