No. The 400 is externally balanced, the 350 is internally balanced.
Just the crank. The flywheel is neutral.
No it's not.
a small block 350 chevy
75 Ft LBS.
How do you change a flywheel on a Chevy truck? You can remove either the engine or the trans. Once you have either removed just remove the bolts holding the flywheel in place.
About the only thing that can go wrong with a flywheel is for it to crack or loose teeth. In either case, you replace it, not repair.