I bought a 73 318 dart off of one of the car collector outfits & the car leans WAY over even in a slight curve. it crossed my mind that maybe it orig was a /6 but that is just thinking out loud.
I would post the bore diameter & if it has the "recess" in the rear piston "thimble" which is needed for a manual brake app. Kinda looks like I can see it in the pics but a quick look see would tell for sure or not
I had a pair of 002/003's on a 65 dart roller (came that way when purchased). When done it rode high & tight (daily driver) & not recollecting that they were uneven. I liked em.