some thoughts:
post the cylinder #s and pressure reading...some relationships may suggest a head gskt....ie adjoining cyl's both low
did you do a "wet" and "dry" reading? simple just add some oil into cyl..will help ID if a ring issue...
also a cylinder leak down test... shop air is attached to gauge flex hose .... applying pressure you can get a good idea where pressure is leaking....ie hissing air out throttle would suggest valves, oil fill cap sound would have you look a piston sealing.....
PS: let us know if its been sitting awhile
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