Disc brakes still not stopping good

Are you using a booster or just manual brakes? The 1 1/32 bore master is too large for a 4-wheel manual disc setup. You'll get a hard pedal like you describe. Dr Diff recommends a 15/16 bore 2-bolt aluminum master in that application. He modifies the standard 15/16 bore masters to accept a manual brake pushrod. Then you use an adaptor to mount it in place of the stock 4-bolt unit. The stock length manual brake pushrod is retained...no need for an adjustable pushrod.