Not sure why people are unable to use the most recent parts available in the first post of the USN parts thread... reproduced here for your convenience:
(use the Mk.38 Mod.1 shield with Mk8. Mod.0 (FH) radar)
(use the Mk.37 with Mk.4 director)
(update your SG radar)
http://www.navweaps.com/Weapons/WNUS_5-38_mk12.htm << this page shows the BB-55 class as having the Mk.28 Mod.0 mount for the 5"/38 Mk.12 gun:
http://www.hnsa.org/doc/guncat/cat-0248.htm
This is the Mk.32 I had drawn for the Alaska - the only difference that will be visible at this scale is the addition of a sight hood for the gun captain. I think Tim had drawn most of the 5"/38 variants using this as a template.