Dodge Repair Questions? Ask a Mechanic for Answers ASAP
Both axial and radial runout would have to be measured with and without a load to get a better idea of what's going on - this is usually done in the shop with the engine on a test bench. I don't know of any other way it could be safely done.
You're asking me to guess on something that is very delicate and I just can't do that in good faith. All I know is that a flywheel that is balanced and true should not need any shims.
Perhaps we're not taking about the same thing; are there any markings on this "shim" you have that would indicate a specific thickness or position? If not, then that's just the standard spacer that comes with all these flywheels. You could use more than one of these spacers as long as those won't cause excessive runout.
Please let me know how you make out.