balanced 340

It depends on how the balance job was done.

If the guy who did it made corrections on the damper than it will change the balance. Also, you are making the assumption that the OE damper was zero balance, the new damper is zero balance and no corrections were made on the OE damper.

Way too many assumptions for me.

That said, Chrysler balance jobs were real pretty and I never had an OE balance shake, but I've seen some other balance jobs shake like a dog pooping peach seeds.