I have a brand new B&M flexplate,never bolted to an engine and also a new dampner for 360 external balanced.My 408 is internally balanced so don,t need these.I paid over $100 for the dampner and $75 for the flexplate.$125 for both or $50 for the flexplate,$75 for the dampner(plus shipping)Let me know if interested?i am keeping it externally balanced