Cm2350 Turbo Help please

[GhostHauling]

this is probably stupid but is there a better way to do away with the crank case filter than the maintenance free filter or is this essentially the same thing. Also I was told that the first three rocker arms on the SX 15 are often rusty and on my truck everything in the overhead looks good cams and rockers the tech said he thinks somebody changed the rocker arms bc they were in such good shape.