I turned up an aluminum adapter to join a bmw driveshaft to the r200 diff, I'm worried about the soft metal threads and not being able to torque the M8 bolts on the diff side. I can't mount a fixed stud because there would not be enough room to install, can't use nuts to sandwich the flange.
I may have to remake the adapter in steel but want to try and make this work first if I can.
So I'm thinking some kind of Helicoil or maybe an interference fit threaded insert.
Would appreciate any advice,