No oil one coming out of one rocker

Sounds like the oil hole in the bottom of the shaft, for that particular rocker may be stopped up with gunk. You can knock the plugs out of the ends of the shafts and run a long handle brush thru them with solvent running in at the same time. They will clean up like new doing that. Knock new plugs in the ends and you should be good to go. Take the old plugs to the parts house and get some new ones.