That's basically what I did but I couldn't weld it in from the top because a seal goes on the top surface I welded up most of the hole and threaded it the epoxy was just to fill some of the voids in my repair and act as a locktight. My thred repair must be ok I tightened the kingpin with a handle from a floor jack on the 7/8 Allen key and it held but I'm still going to let the JB cure before I reassemble that sideIf the thing will thread into the bottom a little bit. I would screw it in and weld the top and call it a day. If the yoke is welded to the axel tube? It has to be cast steel, not cast iron. So a weld should hold. Or you could weld the hole up some. Take a diegrinder burr nock it down a little, and rethread it.