[mickmate]

Bear in mind they rev quicker in all applications. If you considerably lighten your rotating mass it accelerates/decellerates easier. When you bang it down a gear to slow the car it will now try and speed the flywheel (engine RPM) up. We have seen this on SCCA beemers where they over rev and bend valves on a downshift with a light flywheel. The other thing flywheel weight helps with is a drag or standing start. In a light car like a Cobra it shouldn't be an issue but in a Galaxie.........
Cheers Nick