The different lift heights on the intake lobes tells me the cam is wearing out. Run it until one of more of them goes seriously flat, then replace the cam and lifters, and hope the metallic debris the wear is creating doesn't trash the rest of the engine.
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!