[RICK LAKE]

Rottie What happened to the old flywheel? How much power is the 482 output? If you are in the 600/600 club a street twin might be the better answer for your car. Hold all the power with a light pedal.
As long the the flywheel is stamp SFI the only other option is heavy. Was the rotating assembly balanced as a whole or as parts? This means just the crank with bob weight? Or was it done with the dampener, spacer for crank,crank shaft, bob weights and flywheel? This could make a balance different to the motor if this was done.
I have run Schaffer, Zoom, Hayes, Mcleod, and aftermarket Summits that are SFI. NO failures with any of them. I do limit my rpms to a 6,200 max on all motors. If you are replacing your flywheel you might want to look at a better clutch setup with more holding power but without a harder pedal.
I am going to a twim disc setup on my 498 motor. My 482 motor does slip the 11" in the car now. The pressure plate is only 2400 pounds. Rick L. Ps I autocross and roadrace the car. Twin setup are on alot of new cars starting with GTO, Camero, Vette,and I think the new mustang. Pss Is your flywheel rebuildable?? Can the steel insert be replaced only? this should be cheaper than to replace and worry about a balance problem?