/6 to 5.9 magnum questions

Thanks for your reply. I knew about the pan and flex plate. Do you know which harmonic balancer i need with the vbelt. Can i swap pulleys on factory 5.9 balancer or do i need a balancer from an LA
Mopar performance sells a great balancer through summit pricey
Don’t remember about the pulley/situation
I don’t think an la balancer will work in this situation