The damper on my 57 went bad.  I had no trouble removing it, but I can't get the replacement on.  I have removed it a couple of times to check the keyway alignment. and it seems to be properly lined up.  I have cleaned and lightly lubed everything and am using a longer bolt so I had more contact area to engage the threads in the crank.  I can get the bolt started, but afrter tighting it as much as I can with hand tools, the damper isn't moving.  I was turning the engine over, so I blocked the damper so I could tighten the bolt more.  I have tried to pound it with a mallet with a piece of wood on the damper, and that didn't do anything. Should I be able to move the woodruff (sp?) key with my finger?  I have an extra 312 being rebuilt,  but it won't be ready for Columbus.  I was going to put the new engine in. and then rebuild the original 312.  Some things I have heard about doing are, putting the damper in a freezer or heating it up.  Any suggestions greatly appreciated.

Thanks,

Paul J. - '57 E Code