run them unless they are making noise. i still run the original ones in my 8 3/4 and its from a 67 new yorker.
i dont like the green bearings personally. i tried them in my dart and the bearing came loose from the plate that bolts to the axle and started to move in and out of the housing. and with them you have to remove the pin in the center of the rear end between the axles.
i have just never had any problem with the original type. adjust them and forget about it.