[Jack21]

BJ,

Had the same choice to make. Considering the car, and the way you're likely to drive it, there is no reason to use a lighter flywheel on the motor.

The aluminum flywheel should let you rev quicker on the track, but make the car a little more tempermental on the street.

A NEW iron replacement will work if you intend to keep the revs under 5500 and you're on a tight budget.

The best replacement for a mostly street, sometimes race motor would be the SFI billet steel flywheel. Although they cost about double that of an OEM, or aftermarket iron replacement, the SFI billet for my 351 was about $250. Not wildly expensive, and good insurance.