Stop in for a cup of coffee

So i have a slant six 4 speed bell housing that i bought from brewers.

They don't list the ball stud bracket that goes on it.

So i called and talked to the man there and explained what i am trying to put together here.

He says that he is more than sure a ball stud from any 3 speed 63 to 70 should work for me, so that is what i am thinking i need to find now

I don't know if I would have any of those... Most of my stuff is automatic... In fact, it all is....