I just found and joined iModeler and immediately searched for information on Knox class frigates. I found only one article.
USS Miller (FF-1091) was my home for four and a half years in the late 70s. I have a 1:700 kit as well as a 1:350 kit that I intend to build as the Miller from that time period. (I also have model kits of other ships from that time period in 1:700 and 1:350 scale that I will be working on in the future.) The Knox class kits have the later modifications to the class as well as at least one inconsistency.
The most noticeable difference is the addition of "hurricane bows". ("The modification heightened the bow section, adding bulwarks and spray strakes to prevent burrowing into on-coming seas and to better protect the forecastle armament." Source: https://en.wikipedia.org/wiki/Knox-class_frigate) I will need to remove these on my models.
Also added was the CIWS (Close In Weapons System) on the fantail or the BPDMS (Basic Point Defense Missile System). Neither of these were installed on Miller until later so I will need to remove the mounting for them.
My biggest problem is that the AN-ULQ-6 Deception Repeater with its associated AN-SLA-12 Antenna System (along with the AN-WLR-1 ESM domes on the mast) were replaced with the AN-SLQ-32 Countermeasures system. This presents an inconsistency in the models. (There should not be three ESM domes on the mast once the AN-SLQ-32 system was installed. Also, the forward ESM dome should have a smaller, protruding dome on top that I will need to add to my models.)
More importantly to me is that the AN-SLA-12 antenna system is entirely different from that of the AN-SLQ-32 antenna system so it looks like I will have to create those parts myself. So far, I haven't been able to find any great pictures of the AN-SLA-12 antenna system (but I am still looking). If anyone can provide any assistance with this area of the ship, it would be greatly appreciated.