Hi all!
The 5.9 uses a factory roller hydraulic cam, and the rocker arms are pressure oiled through the pushrods like a shivvy, the rockers are very similar to sbc and should be replaced w/good stuff in hp apps, the heads are magnum swirl port and can be made to flow well, the intake bolts go strait down, has a nice timing chain tensioner in place of the typical cam retention plate (these can be used on LA motors too, around $30).