Cal, thanks for the information.  That is a strange design, but I guess it worked for a lot of years' models.  I had mine welded, even though it's cast, by a guy who seemed to know what he was doing.  My manuals don't have any torque specs for this, I don't think, and I have the I&amp;T as well as the oliver service manuals.  They leave out a lot of torque specs.   I used 25 and it held (so far).   Tom