Paul,
How detailed do you want to go? They were very similar, and the Tamiya kit of the Missouri in 1945 can serve as a solid basis for the Wisconsin. However, there were differences.
According to Lester Abbey, Wisconsin was joined by Missouri in May, 1945. The two ships were nearly identical except that Missouri had a prominent SK-2 air search radar mounted on the foremast platform, a large bowl-shaped radar. Wisconsin mounted a flat SK set in the same place. Also, Wisconsin mounted a heightened mainmast and SP radar. These details would be easy to change.
Get the Missouri, look at the photos of both ships in 1945, determine which aftermarket sets would help, and, if you can't find the appropriate radars, I'm sure that any one of us could supply them from our spare parts boxes!
Bill Morrison