I was just goign to ask - 340 or 416? Open or closed chambers? Iron or aluminum? Is there something particular you don;t like about the existing Crower?
The thing I don't about the existing Crower cam is that it has damaged lobes from roller lifter failure and the RPM range was a bit higher than I want.
It was a 20+ year old grind and I thought I could find something that worked a little better.