This is not going to work even if passed. You need five votes to overturn. You
might have three for overturn--Thomas, Scalia and Alito. You will have Roberts only if you are tightening
Roe, not overturning it. Then you need that fifth judge for any tightening and the only one who might move over is Kennedy--and he won't go for a dramatic tightening. So for an overturn, you would be lucky to get a 3-6 vote. The end result will be a strengthening of
Roe with one more major precedent.
Brown vs. Board of Education was overturned based on a long series of steps before it; that is the best you can hope for here.