Dr Diff or Cass as he is known, is one of the most knowledgeable men on these sites when it comes to driveline, rear ends, brakes and a whole lot more. he's never failed me and is always there to help when I need it.
His suggestion for rear springs in my 1970 e-body transformed it from a bumpy, harsh riding beast into a compliant, sure footed near luxury ride. Unbelievable that guy!