Ever heard of a guy named Frankenstein? That's about how much surgery...

Well, for starters:
The front deck and the bow would have to be cut back to the narrower shape.
The sponsons for the light AA guns on either side of the bow would have to be removed. All light AA guns would have be be removed and replaced with a handful (about eight) .50 caliber AA guns.
The 5 inch twin mounts would have to be removed and replaced with 8 inch gun mounts
The eight 5/38 cal single mounts would have to be removed and replaced with twelve 5/25 cal single guns.
The island would have to be reshaped and a tripod with spotting top added
The aft fire control stations (on the back of the funnel) would have to be removed and replaced with the correct platforms.
That's just the stuff I can think of off the top of my head. Take a look at these two models and you can see the differences. Here's the 1/700 Fujimi kit, which I built many moons ago:

And there's the Sara, pre-war. This is a 1/350 model, converted from the Trumpy Lex - which I did before Trumpy came out with a Sara. An example of the old adage that if you convert it (or scratchbuild it), someone will make it.
