The first time I did this on a 380 I thought that a puller would be necessary to remove the harmonic balancer from the hub so I went to borrow a universal type puller from a neighbor (I was on a trip to PA and was conscripted into replacing a leaking water pump on my father-in-law's car). After trying to attach the puller by all possible means I was surprised to feel that the harmonic balancer had begun to wobble free without using the puller so I continued to wiggle the harmonic balancer back and forth from top to bottom and side to side until it came free. Almost an interference fit with the accumulated crud on the hub. Much easier to reinstall the whole assembly provided the balancer and pulley were marked before removal. If you remove the entire hub be sure to heat it as 15289577 says because the keyway is recessed down the crankshaft (stupid IMO) so lining up the hub can be problematic. Mark