Engine RPM?

I wouldn't be afraid to turn it 5500-6000. That cam should get you close to that. The intake would probably die around 5500 anyways. Vary the shift points at the track to see what the car likes.

As far as the old 500 mile break in... I NEVER do that. I've had plenty of BBC's that got the cam broken in and first duty was a 7K RPM burnout... much to my neighbors displeasure. :bootysha: Break in the cam and go beat on it. That 500 mile deal was because machining tolerances were not vary accurate. Gives the metal time to wear off the high spots so to speak. With tooling now days, no need for the break in IMHO.