Steering coupler drift pin question

Does anyone know what size the Steering coupler drift pin is? I had my column out and lost the pin. :BangHead: . Already had bought the kit and don't know what I did with the old one. I even had a spare kit somewhere but can't find that either. I think I swept it up last week not realizing I had dropped it.
on my 74 dart i used a 5/16 pin. they are tough to get out!