Using mustang rotors for 4.5" bc

So, I have read through all 13 pages so far and I have been trying to study this carefully. I bought all the parts recommended but I am not sure if I am missing something here or not? It seems the SKF 16743 rear seal is a larger diameter than the SET 6 inner bearing race? So, if I have the stock 6004R rotor seal surface milled down to where the bearing race begins, it appears there will be nothing left for the new SKF 16743 seal to fit into, even after the bearing race area is machined down into the hub area by .271"?

I guess I am uncertain about the inner seal not fitting and if I misunderstood on which inner seal fits best after the machine work is all done?

Thanks