It's probably time to drop the entire rear end and start looking for a replacement. Either acquire another torque tube setup, or convert to an open driveline. I've got the complete running gear from a 58 GMC 1/2 ton if you're interested- - - -transmission, driveshaft, springs, and rear end. PM or call.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!