...in a big block chevy would you serously start looking into runnin a larger diameter cam?
Cam is Crower billet roller 806/775 284/304 116lsa. It is a smaller base circle than I am used to I just assumed with that lift they had to go to a smaller base circle. Is that right? I have never had a lifter durability problem but have been warned of it due to the small base circle. I currently use Crane pro series standard diameter lifters but will change to Crower or Isky.You can get very aggressive lobes from a std. core. Why not list what you are trying to do and we can help you decide if you should step to the 55mm. There are more variables other than lobe lift that will determine this..