Alright patience is key here. Some people use marvel mystery oil some people use auto tranny fluid. I have done the second one and it works good (esp on motorcycle engines). Alright fill the cylinders through the plug hole with transmission fluid and let it sit like that for a day or two, then use a breaker bar on the crankshaft pulley nut and try rocking it back and forth until it breaks free. keep in mind it doesnt take much rust at all to freeze and engine, but that doesnt mean it will easily become unstuck either though. I would fill them and let em set for about 2-3 days, then try turning it over by hand. After that just vacuum out all the fluid and change oil and try cranking it up then