I would back off nothing in preparation.
Pull off one valve cover, hook up a starter button to the solenoid, unhook your 6AL plug or equiv, and do intake and each exhaust opens and exhaust when intake closes.
If you want to be careful, go around them all again by bumping the starter. You'll be done with one side in no time, even rechecking
Button up that side, then do the other. You'll be amazed how quick it goes.
ON EDIT: Correct yourself now though or you are in for trouble. Its not EVO/IVO.....
EO-IC
EO - Exhaust (starts to) open, anywhere on the opening ramp - adjust intake valve on that cylinder
IC - Intake (starts to) close, anywhere on the closing ramp - adjust exhaust valve on that cylinder
If you do EVOIVO it'll be all over the place