Your POW 39-182 and 39-183 seem to be the same measurements as far as screw holes and arm.
attached is jpeg picture. My only concern is the length of the operator arm from gear teeth to end of arm. There is only one screw hole at the end of the arm. From the end of the arm to the first bend, measures 2 1/2 inches. From that bend to the housing, is another 1 1/2 inches.
