My humble opinion is that the root cause of the diff mount problem is the 
inadequate thickness of the frame that the stud is welded to. Weld an approx. 
2"X4"X1/4" plate to the top of the frame, make a stud that is approx. 1/2" 
longer, drill the plate for the stud and weld it to the plate. This increases 
the area of the frame that takes the load. With that done, I don't think it 
makes any difference which type of mount is used. Of course this requires 
removing the body or cutting a hole in the shelf above the mount.
Berry Price
 
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