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I never took it off of the engine stand, With it on the engine stand, I rotated the engine every 90 % and tried to rotate the engine. When I had cylinders #4,5,6 in the up position I was able to rotate the engine. I kept rotating the engine and on the horizontal it still turned, when 4,5,6 were facing down it got stuck again, but this time just before #1 TDC. I now know that it is not a problem with the engine stand. I put a magnet into each cylinder through the spark plug hole and nothing was there. My fear is it may be an aluminum washer. That is why I am asking around here for a borescope to look into the cylinders. Ebay has them for under $100, I may go that route if I can't get one anywhere else.
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