New engine noise

I had a slant built 2-3 years ago and am now just getting around to putting it in. Still on the stand, no plugs but otherwise fully assembled. I squirted some oil down the holes and turned it via wrench around several times.

Turns fairly easily however there’s a squeak at a few points. I believe I have it narrowed down to certain valves/guides. I can feel a slight vibration if I place my fingers over a particular spring during the squeak

Is this something to worry about? I tried drenching the springs and stems in oil but it didn’t help much. It uses positive seals so I don’t think much of any oil got down the stems.