Heads and cam at 100k
I installed the MS3 cam with springs and pushrods at 130k on my 98 Z28 (M6). Never had a prob with it. Currently around 138k and I still shift out at 6000+ rpms. On the same note, I also added LS6 oil pump, 42lb/hr injectors, double roller timing chain, LS6 intake, and a badd A$$ tune from BlueThunder2Racing at the time if the cam swap. Change the oil regularly and seafoam your internals and maintain your basic fluid and maintenance checks and youll be fine. The car has never ran stronger or Smoother. For a 138k engine it has an aggressive idle with no problems, an insane pull through the rpm band and mid-high rpm power is crazy. MS3 is a big can but as long as u feed it the air and fuel it needs, it won't let ya down.
