Bring my 73 dart swinger back to life.

The one trail beast pictured is a 3-speed motor.
I just ordered a new 2-speed motor for my 73 duster and the motor comes straight out instead of to the side.
I have mine apart so I could measure the length of the arms, but my car was built in the first week of 73 models and it has alot of 72 parts on it.
The wiper arm bushings are square, so by all the books it has 72 and down linkage.