I removed the old drums by taking off the drum and hub as one. It took one good hit with a 6 pound copper slug to separate. Also note, that I installed new wheel studs. When I put the new drum on, I reinstalled the hub then put the drum on, then the wheel. I slowly went round tightening the lugs in till I reached 120 ft.lbs. I tighted each lug any one turn at a time. I heard a pop about half way, removed the wheel an there was crack from one lug hole to the center opening hole. There was also breakage around each lug shoulder. Should the drum have to fit so tight? Should it be loose enough to remove the drum by hand? Maby the shoulders on the new lugs are too large? A new drum is on it's way, should I clearance the lugs holes in the drum to allow the lug shoulder to insert easyer? I'm leaning towards reeming out the the drums lug holes just enough so it tight but not to were it will break.
The first pic shows the breakage that occured each hole. The second pic shows an old lug's shoulder coming up through the hole. This took a good pounding to get the old lug in there. The new ones are even tighter. The rear drums nearly fall off when the wheel is removed. My 67's narrower drums will fall off with a slight tappping from a plastic hammer. Shouldn't these fall off with slight tapping too??? Rock Auto .com shows the front studs to have a tall shoulder and the rear to have a shorter one. I think releaving the drum's lugs hole to make it snug will work.
Nick
