I can get you half way there at least. I am changing all the brakes on my 66 Valiant. The fronts are getting an upgrade to Kelsey Hayes discs which came rebuilt with all RH studs. I'm swapping in an 8-3/4 rear. Everything is going to stay SBP. Since three wheels are now set for RH threads, I had to find new RH rear studs. I got them from (I think?) Rock Auto, at about a buck apiece. They are from Wagner, part# BD61237. I matched these up by stud length and the knurl measurements. If it helps, these are 1-3/16" long.
Just in case you don't know, the front studs will likely be swaged into the hub. If you just use a press to push out the studs you will ruin the hub. You have to gently grind off the swaging to release the stud, then go ahead and press the old ones out.
