According to the info I have both the Missouri and the Wisconsin, as well as the unfinished Kentucky, were 1 3/4" longer than the New Jersey at the water line. I have a picture showing the Kentucky being moved into drydock to remove the engines. What you can see on the bow and is in the caption is that the upper bow section from the Kentucky and the undamaged lower bow section from the Wisconsin are on deck. So I don't think the Wisconsin got any longer in the process.
However are we talking about waterline length or over all length? Water line length of the Iowa 859'-5 3/4", New Jersey 859'-10 1/4", Missouri, Wisconsin, Kentucky 860'-0" However if you look at overall length Iowa 887'-2 3/4", New Jersey 887'-6 5/8", Missouri, Wisconsin, and Kentucky as designed 887'-3". Therefore even if you added three inches to the overall length of the Wisconsin, New Jersey would still be longer by 5/8".