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RTC or a spring fitted to your steering dampener is not a wise idea besides making the steering unnecessarily heaver to turn it also places unnecessary loads on the steering components. I really cannot see the logic in fitting one of these things, there is really no reason or advantage to fit one of these things ever. Many suspension workshops fit them to mask incorrect geometry mainly not enough caster, then camber is not ideal due to the relationship of a beam axle with these bits being fixed so the only way to adjust these items is to roll the diff to a point that gives a good compromise between all 3 geometry settings, caster ,camber and king pin inclination. There is no way you can fit a set of lifted springs and fit the proposed caster correction plates and or drop boxes and expect the geometry to be correct. You have to measure this geometry to know for sure.