There is a tool to grab the teeth of the flywheel & turn it but without it you can pry it with a large screwdriver against the edge of the bellhouseing. Often those old engines you can grab it with your hands & turn it. Take the spark plugs out if nessesary. If the engine is locked up you will have to drop thr oil pan & free up the rod or brg that is holding it. I saw one at vthe junk yard they took a chop saw to the crankshaft.
