Yes.Seals the cylinders, but do not try to turn it over in this condition. What I have done in the past is set each bank horizontal in a stand and squirt some oil in each plug hole then turn it by hand, replace plugs and back off rockers. Stuff intake/exaust ports with oily rags or papertowels.Then place the whole thing in a large garbage bag.
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Harley
69 461 El Camino Nitrous Model, 69 Chevelle coupe
70 El Camino,71 SS Camaro
79 Corvette
Kerrville,Tx.
A Camel is a Horse designed by a commitee