Six Iowa class battleships were started; four were completed. The Kentucky (BB 66) was originally laid down on March 7, 1942. Only a small section had been completed before the slip was needed for other work; the work was restarted later and the ship was laid down again on December 6, 1944. The Illinois (BB 65) was laid down on January 15, 1945. Its start had been delayed by more pressing work.
Ah, yes, the Montana class. 70,000 tons full load, 925 feel long, 28 knots, twelve 16" main guns. Interestingly, its armour was designed to protect against the 'heavy' 2,700 lb. 16" shell. The ships would have been too wide for the Panama canal locks then in existence.