I have a tapered axle on my '55 Plymouth. I have to redo the brake system, but am having problems from the very beginning. I have not been able to remove the brake drum (picture attached). I have used a "heavy duty" puller ( the most heavy duty I can rent locally-- picture also attached). I have beat, torched, used nearly a can of pb blaster ( a little a day for over a week), and used a 200 ft lb, 2100 rpm impact wrench. It seems to have moved a little, but won't break free. I am new to mechanics and can usually figure it out, but this has beaten me all week. Any suggestions or see any things that I am doing wrong here?