Starting an old engine ....

It'd luck more than anything. I had an engine that had a taped intake, taped headers, and spark plugs in it. I sprayed a lot of PB Blaster in each spark plug hole before I sealed it up. When i went to put new plugs in it I noticed some white power in the plug hole. Off came the heads and it's a good thing I did. Every piston had at least one stuck ring and #8 piston had 10 pits .030 deep and the cylinder had scaly rust.