billet flywheel ?

[Jeff Chambers]

Originally Posted by GhettoPop

in a high rpm situation, it can come loose and bust though your floorboards, possibly injuring or killing the driver

Absolutely not true. In fact, you stand a greater chance of this occurring with the stock cast flywheel than with either a billet steel or aluminum flywheel.

A billet flywheel (like chatcher originally asked about) is a good upgrade if you're going to be running the car at high RPMS, on slicks, road racing, or any other situation that is going to impose heat, stress and abuse on the flywheel. A billet flywheel has better uniformity to it as well, so it'll stay truer when heated up. Aluminum flywheels got their start in the road racing ranks (because they spin up quicker) but have found a home in drag racing as well.

Personally, I like my legs alot and want to keep them so an SFI flywheel (or flexplate) has always found its way into my car once the car progressed past what the Ford engineers originally designed it for.