The 140 reading is way above normal. Try putting a bore scope into that spark plug hole and look for lots of carbon deposits. A tablespoon of extra carbon in a combustion chamber can raise the compression ratio by up to about half a point, depending on the size of the chamber.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!