Here are a sample of images of the aft deckhouse that 53 mount and either the quad 1.1-in. mount or two twin 40-mm mounts were installed on. These will illustrate some of the variation in configuration in just this area.
The image below shows Hambleton (DD-455) in a view similar to the one above for the Aaron Ward (DD-483). Note the differences.
The next image shows the Woodworth (DD-460) with a variation to the bulwarks for the quad 1.1-in. mount and future director locations. The shape of the deckhouse deck is the same as on the Aaron Ward and many other Gleaves class units, but the bulwarks are much different.
When the two twin 40-mm mounts were finally installed on the ships that had been equipped with the quad 1.1-in. mount, at first the bulwark configuration stayed basically the same and the Mk 51 directors were installed where the Mk 49 directors were intended to be installed. The image directly below shows Mervine (DD-489) after her twin 40-mm mounts and Mk 51 directors were installed replacing the quad 1.1-in. mount. The next image below shows the Mk 51 directors installed on Laub (DD-613). For both of these ships, the Mk 51 directors were initially installed almost directly on the deck in the original intended locations ... in-line forward of the twin 40-mm mounts.
Apparently the "on the deck" locations for the Mk 51 directors didn't provide an adequate clearance for training on aircraft targets, so some of the units in the Benson-Gleaves class raised the Mk 51 directors as seen on Kalk (DD-611).
Ultimately the Mk 51 directors were relocated inboard of the twin 40-mm mounts on elevated platforms ... of various designs as seen here on Murphy (DD-603) and Bancroft (DD-598).
Once the twin 40-mm mounts and Mk 51 directors were installed on the Woodworth (DD-460), the bulwarks were revised and the Mk 51 directors were moved inboard and raised.