Re: wiper problem
to get more or less wiper arm movement you will need to make the wiper arm lever, under the dash, loinger or shorter. longer gives less arm movement for the same amount of pushrod travel from the motor. shorter yields the opposite. otherwise, to keep things the same except for the motor end of things, make the lever on the motor shaft longer or shorter
also ensure the pivot bushings, all the rod ends etc etc are physically in good shape without a bnch of slop that wastes the movement applied.
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