pull the spark plugs and spray some PB Blaster down the holes. Let it sit over night and try a breaker bar on the crank nut. If it's really that stuck though, don't expect it to run too good when you get it going.
while this engine turned over I did the same. I soaked the cylinders down, turn it a little sprayed some more, let it sit. Then I changed the oil. I then did new points, coil, wires and distrib cap. It was a smokey Joe for a while. (I drained and flushed the tank as much as possible. runs good thou. Good luck. Like said IF it has been under cover or at least the engine out of the elements it should turn. This had no air cleaner for probably 20+ years.
51 Dodge
