A friend of mine is installing a 3 speed windshield wiper motor in his 68 Charger.
When doing this swap, is it manditory to also change the "arms" to the 3 speed ones.
Been getting different answers to this question.
Anyone know with 100% certainty.
Anyone personally do this swap in the past?
Thank's in advance.

Ok. Lets call them the "linkage rods" that connect to the wiper motor in the cowling.