I am every so slowly gathering parts and resources for a USS Indiana build. I say ever so slowly because I have two other ships to upgrade and maintain. You know how it is. First question here. What size props is pretty common for an Indiana. I have a 2" prop on the Bismarck and have been very happy with it. From pictures Ive seen and the plans I have, space back there seems tighter than with other ships.
BB-60 is Alabama btw. same class. but fyi. 1.5 or 1.75 wouldn't be out of the ordinary for a SoDak. btw the sodak has a dump truck ass. you have room. I'd ask @WillCover what he runs
I run 1.625 props on class 5.5 just fine, and my class 6 boats are all getting modeled for 1.75, including the Masshole I'm fixing to CAD up soon
I'd recommend 1.75", and Mr. Anvil, ping me later for superstructure stuff. I may have gotten a start on that or something.