Instead of trying to make the pivot point rigid, why not fabricate a pair of radius rods from the top of the axle housing to the frame, using heim joints and steel tubing? there's a kit on Ebay for just that purpose, using right and left hand thread heim joints so the pinion angle can be adjusted.

www.ebay.com/itm/147147074184?

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!