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

So when I originally purchased my flex plate it was from a friend of a friend, said it was internal balance flex plate. Gave it to the machine shop along with the bottom end and internal balance balancer. They got it done and never looked back. The engine was just taken out because I am replacing a transmission seal. I also bent the flex plate where the bolts go, and was looking to replaced it.... Then I noticed that the one I have from B&M has the notch cut out of it which is the external balance one!!! Damn it!!.... I need help on what I need to do... Can I replace it with the internal balance one or what?!?


For those of you about to ask about vibrations, the car vibrated a lot already because it's a stroker making 500hp and pound exhaust 3inch with turn downs under the car.