Rebuild Runs Rough
If the thing is not firing evenly, then I would not rely on the AFR to tell me where the mixture is. Unburned fuel is not seen at all by the O2 sensor, but unused oxygen WILL be registered, and, as a result, your AFR readings look lean.
isnt 2 turns on the rocker adjutment too much?
Too much lifter piston compression would sure cause the symptoms...... seems worth investigating.
As for the ICA, I suspect it is in the low 60's due to ground-in cam advance; that gives you cranking pressures like what you have.
Any exhaust restrictions going on OP? Like something got dropped down the turbo outlet pipe? Is the turbo spinning freely? I know it won't likely be spooling at idle but it ought to be free. That is one more exhaust restriction that is going to effect back pressure and effect cylinder clearing and filling.
