https://scontent-b-sjc.xx.fbcdn.net...=c39c85c5cd04340b13fe9aac546967ee&oe=5490910C
Yes and no. The bottom of the shoe is (below the strap) pretty much identical to the V2s apart from the SWOOSH and NIKE MAG lettering, so if your worried about stuffing the toe slim and lace thinning, these V3s might be a good tester for you to work on first.
Above the strap, these are slightly different because the cuff looks puffier and the hole is round. Looking at this round hole and it might have enough fabric around it to allow an unpick, nip out three corners, tuck and glue to make these triangular. That would be a mod you can't do on a V2!
You can always add a SWOOSH later on as well.
You will probably have to make new straps from scratch. It is a real shame they stitched that.
There is nothing you can do about the cuff. It is what it is. You may even be able to unpick the extra stitching they have added around the laces. I don't see a reason for it to be there and AFAIK, no V2 ever split down the seam where this stitching is.
As for the heel cup, my plan is to make a new heel cup (for my V2s) using the existing part as a base, mold and cast that. I intend to make the back larger and extend the inner wing a tough and will therefore add a larger M A G to the back. Texturing the surface will be a challenge but at less than $100, I'd be OK to simply chop a pair of these up for parts.
Thing is, given how much my clear soles cost to make (molds alone were over $700), this won't be happening anytime soon.