pull your spark plugs out. pour a little oil down the plug hole and and it should turn relitivly freely,also what I usuly do before turning a motor after its been sitting for a wile (and Im not shure on the 331 but on 350s this is how its done) you get an old screw driver a big one and break the handle off, you then get a 1/2 drive 5/8 socket and some hose you slide the hose over the shaft of the screw driver and then the socket
over the hose and aline it so the head of the screw driver and the bottom of the socket are at the same place,you then plug this new little tool into an electric drill, remove your distributor
you will see a rod with a notch on the top (I think thats how it is on chevys)you stick the new tool over this rod and pull the trigger this will spin the oil pump and pre loob you engine
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