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I internally balance all my engines. With two seperate builds and Eagle cast cranks:
1 - stock rods, forged pistons - needed Mallory.
1 - SIR Eagle rods, forged pistons, needed only drilling (and a lot of it).

If you have a vibration, it is well worth taking it apart and having a shop properly address it. You might get it better but not right, and that crank is not known for taking a lot of abuse well.



Mongoose, I know you don't want to hear it but Moper is on target. Only way to be sure.

I would stop mismatching offset balanced stuff. If you have a vibration with the external balance 360 crap then to me the only crapshoot before pulling it all apart would be going with neutral balance stuff and giving it a go. Since you have a pick-your-imbalance balancer and stock mopar flex plates are a dime a dozen, the only thing it will cost you is labor.

Perhaps a little more info would help. What rods and pistons are in that motor?? I'm assuming there is no balance sheet available from the balance shop with all the weights recorded?

2017 Contusion Blue Challenger T/A 392 M6 "BLKNBLU"