Is there a time frame as to when Ford switched to the "2 bolt" type washer pump over the earlier "3 bolt"?
Again, I am referencing the VA Mustang catalog and they indicate that the 3 bolt unit was used from 64.5-66, and the 2 bolt unit looks to be '66 only.....unless Ford made a switch late in the '65 model year......
VA seems to be indicating that the earlier 3 bolt unit was used with single speed wipers and the later 2 bolt unit was used with 2 speed wipers......