The ships have brand new masts where the main stick is made of armor plate (the wave guides and coaxials run down through it). You would not be allowed to take that down.
By my calculations I added 400 tons of armor to each of the ships. Only about 50 tons was inside for the new communicaitons center. Almost all of it was outside for the Tomahawk deckhouses, armor over the new CEC, applique armor over existing armored structures, etc. Then there was about 400 tons of non-armored steel added for other structures including the ECM house up on 09 level.
Also we ripped out all of the old berthing spaces and sanitary spaces and put all new modular berths in and real toilets. Somewhere in my collection of photos I have one I took of a multi-holer on the Missouri. You really don't want to go back to those.
Though the four 5"/38 mounts we removed were 85 tons each (240 tons total) their armored upper handling rooms (2 1/2" thick STS) were converted into Tomahawk and Harpoon support equipment rooms.
No. It's just not worth it plus it would be in strict violation of the NAVY donation letter that specifically orders that the ship not be modified in any way that would prevent it from being reactivated "as is". Any other modifications required would be by the Navy after withdrawing the ship from donated status.