Brake adjustment is a waste of time when chasing a pull. None of the brakes will apply any stopping force until all the shoes are firmly against the drums. The only problem out of adjustment can cause is a low pedal. Look for sticky wheel cylinders (even new ones) and/or restricted brake flex lines at the front which will allow a pressure buildup before all the brakes are applied. Right pull- - - -change the LEFT front flex line, etc.
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!