67 idler arm problems

The idler arm attachment point to K member became egged out due to previous owner not torqueing it properly. I drove the car for three summers with this lose connection before discovering the problem. This the 67 only tapered tie rod like connection, not the common bolt & rubber bushing connection.

Last summer I reamed the tapered hole out, and made a sheet metal bushing to bring the hole back to its correct size. I was unsuccessful and making a good repair, so I reamed some more used a thicker bushing, and now after driving it several thousand miles it is still sloppy. The problem is I can’t hand hold the ream & drill motor stable enough with the car on jack stands laying on my back.

Has anyone made a successful repair without replacing the K Member with a different year, or cutting the 67 tab off, and welding on a bolt type tab?