I do understand what you mean about the factory rockers. However there is one thing you must remember, the entire valve train is hydraulically driven (which thus could be the Mercedes engineering that you speak of), such as lifters, chain tension, etc. I’ve found solid lash adjusting lifters, and stronger springs for this engine, in which when installed them rockers are going NOWHERE! And also this engine is overhead cam, so no push rods to worry about. I do believe the factory rockers are ratio, but don’t know the specs. I do believe also they’re rolling as well, haven’t looked into it much yet. But still you gatta have faith in this little torque monster! Take care of it, n it will take care of you! I have over 103k on my ’02 (which isn’t bad I guess). Mother bought it brand new back in ’02 and I received it at around 65k, and let me tell you I’ve driven the living hell out of this truck. Plenty of jack rabbits and redlining (wait…what redline? ;D), and very few repairs, in fact only two since I’ve had the truck. They both had to do with the cooling system. That’s it though, never any problems or failures with this engine, and certainly never had a rocker fall off on me haha! Factory head gaskets are still strong as the day my mom bought the thing (and she has a heavier foot than I do!). Idk, it’s been a VERY good truck to all of us, despite how we drive the thing. The only thing is I could use a little more power than 235hp lol!
Getting back on point, the cam makers told me they would need the cores of those cams in order to do anything with them, that’s the sucky part. The thing is, I know Comp has made cams for the 4.7 before because I mean, just go on youtube! I just hope I’m not too late in the game as far as finding someone who can still make them, cause I ain’t switching to a hemi anytime soon, don’t aim to either.