I'd pull the injectors, squirt the cylinders full of Resilone (?). In case you don't know, it's a oil that does a better than average job of freeing up rusty/stuck rings.
After letting it set a few more days, I'd try and turn it by hand. If it turns OK, I'd (with the injectors still out) hook up a battery, crank it over to clear out any remaining oil, clean up, change all fluids, install injectors, battery,,,,,,,,crank her up.
Good luck, RJR