RPM ?s

I'm sure there are other opinions out there, but here's my take:

1. About 4500 RPM.

2. Horsepower limited by lack of breathing stock. RPM limited by soft stock valvesprings. Ultimately limited by the long stroke (piston sped) and 4-main crank (harmonics, strength). Exhaust system MUST be upgraded as well.

3. 5500 RPM with stock pistons, maybe 6500 RPM with lightweight forged custom slugs.

4. Yes.

5. Not sure about that. As the cam lubes by oil slung from the crank, if the cam runs dry you've got bigger problems.

6. I would think bolting a 4 barrel onto a high mileage engine would do it if that's your goal.