Re: Looking for suggestions
Compression ratio is reference to the volume of the cylinder with piston at bottom of the stroke as compared to the volume of the cylinder with piston at the top of the stroke. This is part of the physical design of the engine. At ideal, brand new condition, and probably at mean sea level, this would also result in the imperical data TJ and other refer to which includes a compressed pressure within the cylinder of 125 psi. With age, valves, valve stem seals, and piston ring seals begin to leak. So depending on the life your engine has lead, this maximum cylinder pressure will be lower.
As stated, as long as the pressure reading between all cylinders is within a reasonable margin and none are below 100 psi, you will probably have a serviceable engine with many years left in it.
You do not mention if the engine is equipped with a "new" dry-style air cleaner, or the original "oil bath" air cleaner. Be sure to use the newer more common replaceable air filter. The original oil bath is great for nostalgia, but can shorten engine life.
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