"Bullet nose" harmonic balancer questions.

balancer does one thing, dampen harmonics (and balance an external balanced motor, oops, thats 2) I would inspect the rubber and thats about all you could do. Plenty of good SFI balancers out there, but not many have the counter mass to balance a cast crank external balanced motor. You are going to rebalance with those lighter pistons so you could internally balance and run any aftermarket damper but be careful, going to a neutral balancer will require some serious tungsten in the crank to balance it out.