OK. So you have a bellcrank & pushrod system, not a rocker - rockers are what cars used prior to bellcranks and pushrods.
I am still confused as to whether or not your shock actually moves twice that of the wheel. Have you actually measured it, or are you going on the ratio of lengths of the 2 "arms" of the bellcrank?
if that is what you are doing, then the MR you think you are seeing is erroneous. The pushrod loses a lot of motion compared to the wheel because of it's reclining layout, so the actual whhel to shock movement ration is a lot lower than the ratio of the bellcrank "arm" lengths.
I find it highly doubtful (but I could be wrong) that your shock moves more than the wheel, especially on a French designed car of that vintage!
I'd suggest that you actually measure the ratio by moving the wheel in 1 mm increments and measure the shock length incremental changes.
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