Ctown, even though that does sounds like a lot for a rocker arm stud, if you are talking about a 7/16" screw-in replacement for the stock 3/8" press-in stud, then yes, 50 lbs is OK. If any of the holes poke through to the water jacket, then just make sure you dope up the threads with some sort of liquid teflon pipe thread sealer first (good insurance).
------------------
David
