It would need a lot of work. The bodies are not modular like Megos and are not meant to come apart. The standard torso's hips are hollow and the legs are strung. You would have to make hip pins to snap the CAM legs onto. The neck joint would have to be heavily modded too. You'd also probably have to crack the torso open as well to get the shoulders out.
I'm not saying it would be impossible for the super talented customizers here. Just that it would be a heck of a lot easier (and probably cheaper) to spend the $20 and get a CAM starter set. I too wish they came with two torsos, but it's still a really good deal considering all the parts (heads, wig, limbs and outfits) you get.

