Our newer, 1986 Hatteras has 2 bolts and flanges that pull a tube down into a larger tube that has the packing. Our prop shaft stuffing boxes are the same only larger than the rudder units. I am not sure if i could ever get that far enough apart without lowering the rudders. I have been able to tighten them up enough to stop the water flow. You sure don't have to worry about the rudder packing ever getting hot from being too tight.