Oh crap..... Internally balanced engine with an external balance flex plate?!

nm9stheham said

Well, you did not have it internally balanced if it was an external balance damper up front; the weight changes were necessarily inside but the front half of the engine would still be considered external balance. (The whole term of 'external balance' is a bit misleading anyway; it is just a setup where part of the counterweight is external.)

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Oh OK I see your point as he did "balance" it with the external dampener & I assumed that that was (now) an internal balance. to the OP yes it can be balanced with mixing and matching the parts in question & since your shop balanced it it will still be balanced if as you know the same dampener/tc/flexplate is used like he balanced it for. Holler how it turns out