FROZEN/STUCK low miles motor, HELP!

I have a '65 that has been sitting here for a while, it used to crank 2-3 months ago but now won't budge. I pulled the starter, removed the head and right now it's had PB penetrating oil/spray soaking in the cylinders for 2 days. Any other ideas on freeing it up? Also, how am I supposed to use a breaker bar on the crank to help get it turned? The thing has no bolt on the front of the crankshaft, just a pulley with a hole in it, no place to bolt anything.... it's a 65k mi. 225, with 904 trans., manual steering and brakes, alternator. Cylinder walls look clean and no rust, shiny. It's a verified low miles car and this is frustrating as heck!