upper ball joint install question 1972 dart

first time doing ball joints . stock original a arms . i will be installing the upper ball joints today . my question is should i grease the threads at all before screwing the new one in ? or clean everything off and install dry ? if so , would anti sieze be better than grease ? i plan on tightening to 125 ft lbs . i searched and looked for hours but can find anything . factory service manual just says install by hand and tigten to torque . i am asking because the threads had grease there upon removal , but was not sure if that was just from normal lubrication or not . thanks