Here is what i did.. I used the rebranded whipple balancer by ATI.. I used a impact wrench to remove the bolt but you have to remove the fans to fit.. I used an old bolt welded to another bolt and a big washer and nut to draw on since the new bolt shouldn't be used to pull it on.. and the original bolt is to short..
If the flywheel moves try these tactics.. You can also use the impact instead of torque wrench but u need to know your gun well so you can get close to the torque!
https://www.camaro6.com/forums/showthread.php?t=517100
Or All Girls Garage on wifes car used a special tool on starter flywheel.. minute 6:50
Or you can pull the tranny off and use one bolt hole from flywheel and 1 bolt hole on clock with a bar that has hole drilled in it for the bolts to pass through holding the flywheels still. minute 11:30
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Kong Ported 2650, Crawford Racing Port Injection, Weapon X 112mm Adapter, NW112mm TB, Livernois Ported LT4 Heads, Lingenfelter GT32 stealth cam, Haltech Elite, and Carbon by Trufiber