Stuck/unstuck flat head

If one cylinder head had an obstruction, you would still be able to turn the engine for almost one complete revolution, first one direction then the other. He said he could only move it about 10* .
 
Easy way to find out, put the head back on with the bolts loose and turn it over. If it bumps the head, put another head on and try again. Look to see if the pistons come up past the top of the block, if they do, the block has been skin cut. Paul Selfe.
 
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